The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our consolidated financial
statements and related notes included elsewhere in this Annual Report on Form
10-K, or this Form 10-K. This Form 10-K contains forward-looking statements
within the meaning of Section 27A of the Securities Act and Section 21E of the
Securities Exchange Act of 1934, as amended, or the Exchange Act. These
statements are often identified by the use of words such as "anticipate,"
"believe," "continue," "could," "estimate," "expect," "intend," "may," "plan,"
"project," "will," "would" or the negative or plural of these words or similar
expressions or variations. Such forward-looking statements are subject to a
number of risks, uncertainties, assumptions and other factors that could cause
actual results and the timing of certain events to differ materially from future
results expressed or implied by the forward-looking statements. Factors that
could cause or contribute to such differences include, but are not limited to,
those identified herein, and those discussed in the section titled "Risk
Factors," set forth in Part I, Item 1A of this Form 10-K and in our other
filings with the SEC. You should not rely upon forward-looking statements as
predictions of future events. Furthermore, such forward-looking statements speak
only as of the date of this report. Except as required by law, we undertake no
obligation to update any forward-looking statements to reflect events or
circumstances after the date of such statements.
On December 2, 2019, we acquired Indegy Ltd. ("Indegy") to expand our
Operational Technology ("OT") specific capabilities. The results of operations
of Indegy were not material to our consolidated statement of operations for
2019.
Overview
We are a leading provider of solutions for a new category of cybersecurity that
we call Cyber Exposure. Cyber Exposure is a discipline for managing, measuring
and comparing cybersecurity risk in the digital era. Our enterprise platform
enables broad visibility into an organization's cyber exposure across the modern
attack surface and deep insights that help organizations translate vulnerability
data into business insights to understand and reduce their cybersecurity risk.
Our enterprise platform offerings include Tenable.io, which is our software as a
service, or SaaS, offering and Tenable.sc, which is our on-premises offering,
both of which provide organizations with applications purpose-built for areas of
both traditional and modern attack surfaces, including IT infrastructure and
applications, cloud environments and Industrial IoT and OT environments. These
applications are designed with views, workflows and dashboards to help identify
vulnerabilities, internal and regulatory compliance violations,
misconfigurations and other cybersecurity issues, prioritize these issues for
remediation, and provide insightful remediation guidance.
Our enterprise platform offerings are primarily sold on a subscription basis
with a one-year term. Our subscription terms are generally not longer than three
years. These offerings are typically prepaid in advance. To a lesser extent, we
generate ratably recognizable revenue from perpetual licenses and from the
related ongoing maintenance.
We sell and market our products and services through our field sales force that
works closely with our channel partners, which includes a network of
distributors and resellers, in developing sales opportunities. We use a
two-tiered channel model whereby we sell our enterprise platform offerings to
our distributors, which in turn sell to our resellers, which then sell to end
users, which we call customers.
Many of our enterprise platform customers initially use either our free or paid
version of Nessus, one of the industry's most widely deployed vulnerability
assessment solutions. Nessus, which is the technology that underpins our
enterprise platform offerings, is designed to quickly and accurately identify
vulnerabilities, configuration and compliance issues and malware. Our free
version of Nessus, Nessus Essentials, allows for vulnerability assessment over a
limited number of IP addresses. We believe many of our Nessus customers begin
with Nessus Essentials and subsequently upgrade to Nessus Professional, the paid
version of Nessus; however, we expect many users to continue to use Nessus
Essentials.
We have experienced rapid growth in recent years. Revenue in 2019, 2018 and 2017
was $354.6 million, $267.4 million and $187.7 million, respectively,
representing year-over-year growth of 33% and 42%, respectively. Our net loss in
2019, 2018 and 2017 was $99.0 million, $73.5 million and $41.0 million,
respectively, as we continue to invest in our business and market opportunity.

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Financial Highlights
Below are our key financial results:
                                                          Year Ended December 31,
(in thousands, except per share data)                2019           2018           2017
Revenue                                          $  354,586     $  267,360     $  187,727
Loss from operations                                (90,799 )      (72,581 )      (40,760 )
Net loss                                            (99,013 )      (73,521 )      (41,022 )
Net loss per share attributable to common
stockholders, basic and diluted                       (1.03 )        (1.38 )        (1.88 )
Net cash used in operating activities               (10,744 )       (2,559 )       (6,266 )
Purchases of property and equipment                 (20,674 )       (5,733 

) (2,755 )




Factors Affecting Our Performance
Product Leadership
Our enterprise platform provides visibility into the broadest range of
traditional and modern IT assets across cloud and on-premises environments. We
are intensely focused on continued innovation and ongoing development of our
enterprise platform offerings that empower organizations to understand and
reduce their cyber exposure. Additionally, we continue to expand the
capabilities of our Nessus products, specifically as they relate to the ability
to scan for and detect the rapidly expanding volume of vulnerabilities.
We intend to continue to invest in our engineering capabilities and marketing
activities to maintain our position in the highly-competitive market for
cybersecurity solutions. Our results of operations may fluctuate as we make
these investments to drive increased customer adoption and usage.
New Enterprise Platform Customer Acquisition
We believe that our customer base provides a significant opportunity to expand
sales of our enterprise platform offerings and that our ability to continue to
grow our enterprise platform customers will increase future opportunities for
renewals and follow-on sales. We believe that we have significant room to
increase our market share.
We expect to grow our enterprise platform customers by continuing to expand our
sales organization and leveraging our channel partner network, which we believe
will allow us to identify new enterprise customers, enter new markets, including
internationally, as well as to convert more of our existing Nessus Professional
customers to enterprise platform customers.
We have increased our sales and marketing headcount in recent years and we will
continue to invest in our partner network and sales and marketing capability in
order to grow domestically and internationally.
Retaining and Expanding Revenue from Existing Customers
Our enterprise platform offerings utilize IT asset-based or IP address-based
pricing models. Once enterprise customers have licensed our platform offerings,
they typically seek broader coverage over their traditional IT assets, including
networking infrastructure, desktops and on-premises servers. As customers launch
new applications or migrate existing applications to the cloud and deploy web
applications, containers, internet of things, or IoT, and operational
technology, or OT, they often increase the scope of their subscriptions and/or
add additional perpetual licenses to our enterprise platforms.
We are also focused on upselling customers from Nessus Professional to our
enterprise platform offerings. Nessus Professional customers are typically
organizations or independent security consultants that use Nessus Professional
for a single vulnerability assessment at a point in time. We seek to convert
these customers to our enterprise platform offerings, which provide continuous
visibility and insights into their attack surface, as their needs develop.

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Further, we plan to expand existing platform capabilities and launch new
products, which we believe will drive new product purchases
and follow-on purchases over time, thereby contributing to customer renewals. We
believe that there is a significant opportunity to drive additional sales to
existing customers, and we expect to invest in sales and marketing and customer
success personnel and activities to achieve additional revenue growth from
existing customers. However, our ability to increase sales to existing customers
will depend on a number of factors, including satisfaction or dissatisfaction
with our products and services, competition, pricing, economic conditions or
overall changes in our spending levels.
We evaluate our ability to expand sales with our existing customers by assessing
our dollar-based net expansion rate. We calculate our dollar-based net expansion
rate as follows:
•      Denominator: To calculate our dollar-based net expansion rate as of the

end of a reporting period, we first determine the annual recurring

revenue, or ARR, from all active subscriptions and maintenance from

perpetual licenses as of the last day of the same reporting period in the

prior year. This represents recurring payments that we expect to receive

in the next 12-month period from the cohort of customers that existed on


       the last day of the same reporting period in the prior year.


•      Numerator: We measure the ARR for that same cohort of customers

representing all subscriptions and maintenance from perpetual licenses

based on customer orders as of the end of the reporting period.




We calculate dollar-based net expansion rate by dividing the numerator by the
denominator.
While our dollar-based net expansion rate may decline or fluctuate from quarter
to quarter based on the result of a number of factors, including our existing
customers' satisfaction with our solutions, the pricing of our solutions and the
ability of competing solutions and the pricing thereof, our dollar-based net
expansion rate has historically exceeded, and we expect that it will continue to
exceed, 110%.
Investing in Business Growth
Since our founding, we have invested significantly in growing our business. We
intend to continue to invest in sales and marketing to grow our sales team,
expand brand and Cyber Exposure awareness and optimize our channel partner
network. We also intend to continue to invest in our research and development
team to further our technological leadership position in Cyber Exposure and
enhance the functionality of our solutions. Any investments we make in our sales
and marketing and research and development teams will occur in advance of
experiencing the benefits from such investments, so it may be difficult for us
to determine if we are efficiently allocating resources in those areas. We may
also explore acquisitions of businesses, technology and/or development personnel
that will expand and enhance the functionality of our platform offerings. These
investment activities could increase our net losses over the short term if our
revenue growth does not increase at higher rates. However, we expect that these
investments will ultimately benefit our results of operations.
Key Operating and Financial Metrics
To supplement our consolidated financial statements, which are prepared and
presented in accordance with GAAP, we use certain operating metrics and non-GAAP
financial measures, as described below, to understand and evaluate our core
operating and financial performance. These non-GAAP financial measures, which
may be different than similarly titled measures used by other companies, are
presented to enhance investors' overall understanding of our financial
performance and should not be considered a substitute for, or superior to, the
financial information prepared and presented in accordance with GAAP.
We believe that these operating metrics and non-GAAP financial measures provide
useful information about our operating and financial performance, enhance the
overall understanding of our past performance and future prospects and allow
for greater transparency with respect to important metrics used by management
for financial and operational decision-making. We present these operating
metrics and non-GAAP financial measures to assist investors in seeing our
operating and financial performance using a management view and because we
believe that these measures provide an additional tool for investors to use in
comparing our core operating and financial performance over multiple periods
with other companies in our industry.

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Calculated Current Billings
We use the non-GAAP measure of calculated current billings, which we believe is
a key metric to measure our periodic performance. Given that most of our
customers pay in advance, we typically recognize a majority of the related
revenue ratably over time. We use calculated current billings to measure and
monitor our ability to provide our business with the working capital generated
by upfront payments from our customers.
Calculated current billings consists of revenue recognized in a period plus the
change in current deferred revenue in the corresponding period. We believe that
calculated current billings, which excludes deferred revenue for periods beyond
twelve months in a customer's contractual term, more closely correlates with
annual contract value and that the variability in total billings, depending on
the timing of large multi-year contracts and the preference for annual billing
versus multi-year upfront billing, may distort growth in one period over
another. While we believe that calculated current billings provides valuable
insight into the cash that will be generated from sales of our subscriptions,
this metric may vary from period-to-period for a number of reasons, and
therefore has a number of limitations as a quarter-to-quarter or year-over-year
comparative measure. For example, calculated current billings include amounts
that have not yet been recognized as revenue; an increasing number of large
sales transactions, for which the timing has and will continue to vary, may
occur in quarters subsequent to or in advance of those that we anticipate; and
our calculation of current billings may be different from other companies that
report similar financial measures. Additionally, calculated current billings in
any one period may be impacted by the timing of customer renewals, including
early renewals, which could favorably or unfavorably impact year-over-year
comparisons. Because of these and other limitations, you should consider
calculated current billings along with revenue and our other GAAP financial
results.
Our adoption of Accounting Standards Codification Topic 606, Revenue From
Contracts With Customers as of January 1, 2017 resulted in a $55.0 million
increase in deferred revenue primarily related to the deferral of perpetual
license revenue. This cumulative adjustment to deferred revenue at January 1,
2017 increased calculated current billings by $16.7 million in 2017, $11.8
million in 2018 and $5.6 million in 2019 and is expected to increase our
calculated current billings by $1.9 million in 2020.
The following table presents a reconciliation of revenue, the most directly
comparable financial measure calculated in accordance with GAAP, to calculated
current billings:
                                                               Year Ended December 31,
(in thousands)                                            2019           2018           2017
Revenue                                               $  354,586     $  267,360     $  187,727
Deferred revenue (current), end of period                274,348        213,644        154,898
Deferred revenue (current), beginning of period(1)(2)   (214,069 )     (154,898 )     (107,006 )
Calculated current billings                           $  414,865     $  326,106     $  235,619


_______________
(1)  Deferred revenue (current), beginning of period for 2019 includes $0.4
million related to Indegy's deferred revenue at the acquisition date, which is
not included in the deferred revenue (current), end of period for 2018.
(2)  In connection with adopting ASC 606, we recorded $19.0 million of current
deferred revenue on January 1, 2017 related to perpetual license revenue
recognized in prior periods.
Free Cash Flow
We use the non-GAAP measure of free cash flow, which we define as GAAP net cash
flows from operating activities reduced by purchases of property and equipment.
We believe free cash flow is an important liquidity measure of the cash (if any)
that is available, after purchases of property and equipment, for investment in
our business and to make acquisitions. We believe that free cash flow is useful
to investors as a liquidity measure because it measures our ability to generate
or use cash.
Our use of free cash flow has limitations as an analytical tool and you should
not consider it in isolation or as a substitute for an analysis of our results
under GAAP. First, free cash flow is not a substitute for net cash flows from
operating activities. Second, other companies may calculate free cash flow or
similarly titled non-GAAP financial

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measures differently or may use other measures to evaluate their performance,
all of which could reduce the usefulness of free cash flow as a tool for
comparison. Additionally, the utility of free cash flow is further limited as it
does not reflect our future contractual commitments and does not represent the
total increase or decrease in our cash balance for a given period. Because of
these and other limitations, you should consider free cash flow along with net
cash used in operating activities and our other GAAP financial measures.
The following table presents a reconciliation of net cash used in operating
activities, the most directly comparable financial measure calculated in
accordance with GAAP, to free cash flow:
                                             Year Ended December 31,
(in thousands)                           2019          2018         2017

Net cash used in operating activities $ (10,744 ) $ (2,559 ) $ (6,266 ) Purchases of property and equipment (20,674 ) (5,733 ) (2,755 ) Free cash flow(1)

$ (31,418 )   $ (8,292 )   $ (9,021 )

_______________


(1)  Free cash flow in 2019 included non-recurring cash payments totaling $13.1
million associated with the Indegy acquisition, including $6.7 million for
income taxes on the transfer of acquired intellectual property, $3.1 million for
other costs related to the intellectual property transfer, $1.8 million for the
settlement of unvested acquiree equity awards, and $1.5 million for
acquisition-related expenses. Capital expenditures related to our new
headquarters in 2019 were $11.4 million. Contributions to our employee stock
purchase plan in 2019 and 2018 impacted free cash flow by $(0.9) million and
$6.3 million, respectively.
Enterprise Platform Customers
We believe that our customer base provides a significant opportunity to expand
sales of our enterprise platform offerings. The following tables summarize key
components of our customer base:
                                                        Year Ended December 

31,


                                                    2019         2018       

2017


Number of new enterprise platform customers added
in period(1)                                        1,511        1,178        1,017


_______________
(1)  We define an enterprise platform customer as a customer that has licensed
Tenable.io or Tenable.sc for an annual amount of $5,000 or greater. New
enterprise platform customers represent new customer logos during the periods
presented and do not include customer conversions from Nessus Professional to
enterprise platforms.
                                                           At December 31,
                                                    2019        2018        2017
Number of customers with $100,000 and greater in
annual contract value at end of period               641         453        

265




Non-GAAP Loss from Operations and Non-GAAP Operating Margin
We use non-GAAP loss from operations along with non-GAAP operating margin as key
indicators of our financial performance. We define these non-GAAP financial
measures as their respective GAAP measures, excluding the effects of stock-based
compensation, acquisition-related expenses and amortization of acquired
intangible assets. Acquisition-related expenses include transaction expenses and
costs related to the transfer of acquired intellectual property.
We believe that these non-GAAP financial measures provide useful information
about our core operating results over multiple periods. There are a number of
limitations related to the use of the non-GAAP financial measures as compared to
GAAP loss from operations and operating margin, including that non-GAAP loss
from operations and non-GAAP operating margin exclude stock-based compensation
expense, which has been, and will continue to be for the foreseeable future, a
significant recurring expense in our business and an important part of our
compensation strategy.

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The following table presents a reconciliation of loss from operations, the most
directly comparable financial measure calculated in accordance with GAAP, to
non-GAAP loss from operations, and operating margin, the most directly
comparable financial measure calculated in accordance with GAAP, to non-GAAP
operating margin:
                                                    Year Ended December 31,
(dollars in thousands)                         2019           2018           2017
Loss from operations                       $ (90,799 )    $ (72,581 )    $ (40,760 )
Stock-based compensation                      43,443         22,875          7,760
Acquisition-related expenses                   3,970              -              -
Amortization of acquired intangible assets       620            603            603
Non-GAAP loss from operations              $ (42,766 )    $ (49,103 )    $ (32,397 )

Operating margin                                 (26 )%         (27 )%         (22 )%
Non-GAAP operating margin                        (12 )%         (18 )%         (17 )%


Non-GAAP Net Loss, Non-GAAP Net Loss Per Share and Pro Forma Non-GAAP Net Loss
Per Share
We use non-GAAP net loss, which excludes the effect of the accretion of Series A
and B redeemable convertible preferred stock, stock-based compensation,
acquisition-related expenses and amortization of acquired intangible assets, as
well as the related tax impact, to calculate non-GAAP net loss per share and pro
forma non-GAAP net loss per share. Pro forma non-GAAP net loss per share is
calculated by giving effect to the conversion of our redeemable convertible
preferred stock into common stock as though the conversion occurred at the
beginning of each period presented prior to 2019. We believe that these non-GAAP
measures provide important information to management and investors because they
facilitate comparisons of our core operating results over multiple periods.

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The following table presents a reconciliation of net loss, and net loss per share attributable to common stockholders, the most comparable financial measures calculated in accordance with GAAP, to non-GAAP net loss, non-GAAP net loss per share and pro forma non-GAAP net loss per share:


                                                          Year Ended December 31,
(in thousands, except for per share amounts)         2019           2018    

2017


Net loss attributable to common stockholders     $  (99,013 )   $  (73,955 )   $  (41,785 )
Accretion of Series A and B redeemable
convertible preferred stock                               -            434            763
Acquisition-related expenses                          3,970              -              -
Tax impact of acquisition(1)                         10,582              -              -
Stock-based compensation                             43,443         22,875          7,760
Tax impact of stock-based compensation(2)               (95 )         (218 )          (54 )
Amortization of acquired intangible assets(3)           620            603  

603


Non-GAAP net loss                                $  (40,493 )   $  (50,261 

) $ (32,713 )



Net loss per share attributable to common
stockholders, basic and diluted                  $    (1.03 )   $    (1.38 )   $    (1.88 )
Accretion of Series A and B redeemable
convertible preferred stock                               -           0.01           0.03
Acquisition-related expenses                           0.04              -              -
Tax impact of acquisition(1)                           0.11              -              -
Stock-based compensation                               0.45           0.42           0.35
Tax impact of stock-based compensation(2)                 -              -              -
Amortization of acquired intangible assets(3)          0.01           0.01  

0.03

Non-GAAP net loss per share, basic and diluted $ (0.42 ) $ (0.94 ) $ (1.47 )



Weighted-average shares used to compute net loss
per share attributable to common stockholders
and non-GAAP net loss per share, basic and
diluted                                              96,014         53,669  

22,211


Pro forma adjustment to reflect the assumed
conversion of our convertible redeemable
preferred stock as of the beginning of the
period                                                    -         31,107  

55,386


Weighted-average shares used to compute pro
forma non-GAAP net loss per share, basic and
diluted                                              96,014         84,776  

77,597



Pro forma non-GAAP net loss per share, basic and
diluted                                          $    (0.42 )   $    (0.59 )   $    (0.42 )


________________
(1)  The tax impact of the acquisition includes $6.3 million of current tax
expense and $4.2 million of deferred tax expense related to the transfer of
acquired intellectual property.
(2)  The tax impact of stock-based compensation is based on the tax treatment
for applicable tax jurisdictions.
(3)  The tax impact of amortization of acquired intangible assets is not
material.
Components of Our Results of Operations
Revenue
We generate revenue from subscription arrangements for our software and
cloud-based solutions, perpetual licenses, maintenance associated with perpetual
licenses and professional services.
Our subscription arrangements generally have annual or multi-year contractual
terms to use our software or cloud-based solutions, including ongoing software
updates during the contractual period. Revenue is recognized ratably over the
subscription term given the critical utility provided by the ongoing updates
that are released throughout the contract period.

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Our perpetual licenses are generally sold with one or more years of maintenance,
which includes ongoing software updates. Given the critical utility provided by
the ongoing software updates and updated ability to identify network
vulnerabilities included in maintenance, we combine the perpetual license and
the maintenance into a single performance obligation. Perpetual license
arrangements generally contain a material right related to the customer's
ability to renew maintenance at a price that is less than the initial license
fee. We apply a practical alternative to allocating a portion of the transaction
price to the material right performance obligation and estimate a hypothetical
transaction price which includes fees for expected maintenance renewals based on
the estimated economic life of perpetual license contracts. We allocate the
transaction price between the cybersecurity subscription provided in the initial
contract and the material right related to expected contract renewals based on
the hypothetical transaction price. We recognize the amount allocated to the
combined license and maintenance performance obligation over the initial
contractual period, which is generally one year. We recognize the amount
allocated to the material right over the expected maintenance renewal period,
which begins at the end of the initial contractual term and is generally four
years. We have estimated the five-year economic life of perpetual license
contracts based on historical contract attrition, expected renewal periods, the
lifecycle of our technology and other factors. This estimate may change over
time.
Professional services and other revenue is primarily comprised of advisory
services and training related to the deployment and optimization of our
products. These services do not result in significant customization of our
products. Professional services and other revenue is recognized as the services
are performed.
We have historically experienced, and expect in the future to experience,
seasonality in entering into agreements with customers. We typically enter into
a significantly higher percentage of agreements with new customers, as well as
renewal agreements with existing customers, in the third and fourth quarters of
the year. The increase in customer agreements in the third quarter is primarily
attributable to U.S. government and related agencies, and the increase in the
fourth quarter is primarily attributable to large enterprise account buying
patterns typical in the software industry. Our recent growth and the ratable
nature of our subscription revenue makes this seasonality less apparent in our
overall financial results.
Cost of Revenue, Gross Profit and Gross Margin
Cost of revenue includes personnel costs related to our technical support group
that provides assistance to customers, including salaries, benefits, bonuses,
payroll taxes and stock-based compensation. Cost of revenue also includes cloud
infrastructure costs, the costs related to professional services and training,
depreciation, amortization of acquired and developed technology and allocated
overhead costs, which consist of information technology and facilities.
We intend to continue to invest additional resources in our cloud-based platform
and customer support team as we grow our business. The level and timing of
investment in these areas could affect our cost of revenue in the future.
Gross profit, or revenue less cost of revenue, and gross margin, or gross profit
as a percentage of revenue, have been and will continue to be affected by
various factors, including the timing of our acquisition of new customers and
our renewals of and follow-on sales to existing customers, the costs associated
with operating our cloud-based platform, the extent to which we expand our
customer support team and the extent to which we can increase the efficiency of
our technology and infrastructure through technological improvements.
We expect our gross profit to increase in absolute dollars but our gross margin
to decrease, as we expect revenue from our cloud-based subscriptions to increase
as a percentage of revenue, although our gross margin could fluctuate from
period to period depending on the interplay of all of these factors.
Operating Expenses
Our operating expenses consist of sales and marketing, research and development
and general and administrative expenses. Personnel costs are the most
significant component of operating expenses and consist of salaries, benefits,
bonuses, payroll taxes and stock-based compensation expense. Operating expenses
also include depreciation and amortization as well as allocated overhead costs
including IT and facilities costs.

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Sales and Marketing
Sales and marketing expense consists of personnel costs, sales commissions,
marketing programs, travel and entertainment, expenses for conferences and
events and allocated overhead costs.
We intend to continue to make investments in our sales and marketing teams to
grow revenue, further penetrate the market and expand our global customer base.
We expect our sales and marketing expense to continue to increase in absolute
dollars and to be our largest operating expense category for the foreseeable
future. However, as our revenue increases, we expect our sales and marketing
expense to decrease as a percentage of our revenue over the long term, although
our sales and marketing expense may fluctuate as a percentage of our revenue
from period to period due to the timing and extent of these expenses.
Research and Development
Research and development expense consists of personnel costs, software used to
develop our products, travel and entertainment, consulting and professional fees
for third-party development resources as well as allocated overhead. Our
research and development expense supports our efforts to continue to add
capabilities to our existing products and enable the continued detection of new
network vulnerabilities.
We expect our research and development expense to continue to increase in
absolute dollars for the foreseeable future as we continue to invest in research
and development efforts to enhance the functionality of our cloud-based
platform. However, we expect our research and development expense to decrease as
a percentage of our revenue over the long term, although our research and
development expense may fluctuate as a percentage of our revenue from period to
period due to the timing and extent of these expenses.
General and Administrative
General and administrative expense consists of personnel costs for our
executive, finance, legal, human resources and administrative departments.
Additional expenses include travel and entertainment, professional fees,
insurance, allocated overhead, and acquisition related costs.
We expect our general and administrative expense to continue to increase in
absolute dollars for the foreseeable future due to additional costs associated
with accounting, compliance, insurance and investor relations as a public
company. However, we expect our general and administrative expense to decrease
as a percentage of our revenue over the long term, although our general and
administrative expense may fluctuate as a percentage of our revenue from period
to period due to the timing and extent of these expenses.
Interest Income, Net
Interest income, net consists primarily of interest income earned on cash and
cash equivalents and short-term investments and interest expense in connection
with fees for our unused revolving credit facility.
Other Expense, Net
Other expense, net consists primarily of foreign currency remeasurement and
transaction gains and losses.
Provision for Income Taxes
Provision for income taxes consists of income taxes in certain foreign
jurisdictions in which we conduct business and withhold taxes on sales with
customers. We have recorded deferred tax assets for which a full valuation
allowance has been provided, including net operating loss carryforwards and tax
credits. We expect to maintain this full valuation allowance for the foreseeable
future as it is more likely than not that some or all of those deferred tax
assets may not be realized based on our history of losses. In 2019, the
provision for income taxes included the tax impact related to the transfer of
acquired intellectual property.

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Results of Operations
The following tables set forth our consolidated results of operations for the
periods presented:
                                       Year Ended December 31,
(in thousands)                    2019          2018          2017
Revenue                        $ 354,586     $ 267,360     $ 187,727
Cost of revenue(1)                60,818        43,167        25,588
Gross profit                     293,768       224,193       162,139
Operating expenses:
Sales and marketing(1)           228,035       173,344       116,299

Research and development(1) 87,064 76,698 57,673 General and administrative(1) 69,468 46,732 28,927 Total operating expenses 384,567 296,774 202,899 Loss from operations

             (90,799 )     (72,581 )     (40,760 )
Interest income (expense), net     5,830         2,355           (75 )
Other expense, net                  (680 )        (931 )         (16 )
Loss before income taxes         (85,649 )     (71,157 )     (40,851 )
Provision for income taxes        13,364         2,364           171
Net loss                       $ (99,013 )   $ (73,521 )   $ (41,022 )


_______________

(1) Includes stock-based compensation expense as follows:


                                            Year Ended December 31,
(in thousands)                            2019        2018        2017
Cost of revenue                        $   2,817    $  1,707    $   281
Sales and marketing                       16,032       6,911      1,579
Research and development                   8,911       5,804      1,782
General and administrative                15,683       8,453      4,118

Total stock-based compensation expense $ 43,443 $ 22,875 $ 7,760




Comparison of 2019 and 2018
Revenue
                            Year Ended December 31,             Change
(dollars in thousands)         2019              2018         ($)      (%)
Revenue                $     354,586          $ 267,360    $ 87,226    33 %


The increase in revenue of $87.2 million was comprised of increases in
subscription revenue of $84.7 million and professional services and other
revenue of $3.0 million, net of a decrease in perpetual license and maintenance
revenue of $0.5 million. Revenue from existing customers comprised 84% of the
increase, while the remaining increase was due to revenue from new customers
since January 1, 2019. International revenue increased $40.4 million, or 45%.

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Cost of Revenue, Gross Profit and Gross Margin


                          Year Ended December 31,           Change
(dollars in thousands)      2019             2018         ($)      (%)
Cost of revenue        $     60,818       $ 43,167     $ 17,651    41 %
Gross profit                293,768        224,193       69,575    31 %
Gross margin                     83 %           84 %

The increase in cost of revenue of $17.7 million was primarily due to: • a $7.3 million increase in personnel costs, primarily due to increased

headcount, including a $1.1 million increase in stock-based compensation;

• a $7.0 million increase in third-party cloud infrastructure costs, largely

associated with the increased adoption of Tenable.io, as well as the

launch of Tenable Lumin;

• a $0.9 million increase in allocated overhead costs driven by both the

increase in headcount and the overall increase in such costs on a

year-over-year basis;

• a $0.6 million increase professional fees;

• a $0.6 million increase in depreciation and amortization; and

• a $0.5 million increase in software subscriptions.




Operating Expenses
Sales and Marketing
                            Year Ended December 31,             Change
(dollars in thousands)         2019              2018         ($)      (%)

Sales and marketing $ 228,035 $ 173,344 $ 54,691 32 %




The increase in sales and marketing expense of $54.7 million was primarily due
to:
•      a $32.1 million increase in personnel costs, largely associated with an

increase in headcount, including a $9.1 million increase in stock-based

compensation;

• a $10.0 million increase in sales commissions, including sales commission


       draws, due to increased sales and the amortization of deferred
       commissions;

• a $5.7 million increase in selling expenses, including travel and meeting


       costs and software subscriptions;


•      a $3.4 million increase in allocated overhead costs driven by both the
       increase in headcount and the overall increase in such costs on a
       year-over-year basis; and

• a $3.2 million increase in expenses for demand generation programs,

including advertising, sponsorships, and brand awareness efforts aimed at

acquiring new customers.




Research and Development
                              Year Ended December 31,              Change
(dollars in thousands)            2019              2018         ($)      (%)
Research and development $      87,064            $ 76,698    $ 10,366    14 %


The increase in research and development expense of $10.4 million was primarily
due to:
•      an $8.1 million increase in personnel costs, largely associated with an

increase in headcount, including a $3.3 million increase in stock-based

compensation, and net of $1.7 million of development costs and stock-based


       compensation capitalized related to internal use software;



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• a $2.0 million increase in third-party cloud infrastructure costs related

to the development of new and future offerings;

• a $0.9 million increase in software subscriptions; and

• a $0.7 million increase in allocated overhead driven by both the increase

in headcount and the overall increase in such costs on a year-over-year

basis, partially offset by

• a $0.9 million decrease in travel and meeting costs.




General and Administrative
                                Year Ended December 31,              Change
(dollars in thousands)              2019              2018         ($)      (%)
General and administrative $      69,468            $ 46,732    $ 22,736    49 %

The increase in general and administrative expense of $22.7 million was primarily due to: • a $12.3 million increase in personnel costs, largely associated with an

increase in headcount, including a $6.4 million increase in stock-based


       compensation;


•      a $4.0 million increase in acquisition-related expenses, including $2.1
       million related to the transfer of acquired intellectual property;


•      a $3.7 million increase in professional fees, which includes costs
       associated with being a public company; and

• a $1.1 million increase in allocated overhead driven by both the increase

in headcount and the overall increase in such costs on a year-over-year


       basis.


Comparison of 2018 and 2017
Revenue
                            Year Ended December 31,             Change
(dollars in thousands)         2018              2017         ($)      (%)
Revenue                $     267,360          $ 187,727    $ 79,633    42 %


The increase in revenue of $79.6 million was comprised of increases in
subscription revenue of $72.9 million, perpetual license and maintenance revenue
of $4.3 million and professional services and other revenue of $2.4 million.
Revenue from existing customers comprised 68% of the increase, while the
remaining increase was due to revenue from new customers since January 1, 2018.
International revenue increased $31.6 million, or 55%.
Cost of Revenue, Gross Profit and Gross Margin
                          Year Ended December 31,           Change
(dollars in thousands)      2018             2017         ($)      (%)
Cost of revenue        $     43,167       $ 25,588     $ 17,579    69 %
Gross profit                224,193        162,139       62,054    38 %
Gross margin                     84 %           86 %

The increase in cost of revenue of $17.6 million was primarily due to: • a $6.9 million increase in personnel costs, primarily due to increased

headcount, including a $1.4 million increase in stock-based compensation;

• a $5.3 million increase in third-party cloud infrastructure costs, largely


       associated with the increased adoption of Tenable.io;



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• a $3.3 million increase in allocated overhead costs driven by both the

increase in headcount and the overall increase in such costs on a

year-over-year basis;

• a $0.8 million increase in software subscription expenses; and

• a $0.5 million increase in depreciation and amortization.




Operating Expenses
Sales and Marketing
                            Year Ended December 31,             Change
(dollars in thousands)         2018              2017         ($)      (%)

Sales and marketing $ 173,344 $ 116,299 $ 57,045 49 %




The increase in sales and marketing expense of $57.0 million was primarily due
to:
•      a $29.2 million increase in personnel costs, largely associated with an

increase in headcount, including a $5.3 million increase in stock-based

compensation;

• a $14.3 million increase in sales commissions, including sales commission


       draws, due to increased sales and the amortization of deferred
       commissions;

• a $6.1 million increase in expenses for demand generation programs,

including advertising, sponsorships and brand awareness efforts aimed at

acquiring new customers; and

• a $4.9 million increase in selling expenses, including travel and meeting

costs and the costs of software subscriptions.

Research and Development


                              Year Ended December 31,              Change
(dollars in thousands)            2018              2017         ($)      

(%)


Research and development $      76,698            $ 57,673    $ 19,025

33 %




The increase in research and development expense of $19.0 million was primarily
due to:
•      a $15.1 million increase in personnel costs, largely associated with an

increase in headcount, including a $4.0 million increase in stock-based

compensation, and net of $2.4 million of development costs capitalized

related to internal use software;

• a $1.6 million increase in third-party cloud infrastructure costs related

to the development of new and future offerings;

• a $0.7 million increase in software subscription expenses; and

• a $0.6 million increase in allocated overhead driven by both the increase


       in headcount and the overall increase in such costs on a year-over-year
       basis.


General and Administrative
                                Year Ended December 31,              Change
(dollars in thousands)              2018              2017         ($)      (%)
General and administrative $      46,732            $ 28,927    $ 17,805    62 %

The increase in general and administrative expense of $17.8 million was primarily due to: • a $11.9 million increase in personnel costs, largely associated with an

increase in headcount, including a $4.3 million increase in stock-based


       compensation;


•      a $3.3 million increase in professional fees, which includes costs
       associated with being a public company; and



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• a $0.8 million increase in software subscription expense.




Liquidity and Capital Resources
At December 31, 2019, we had cash and cash equivalents consisting of bank
deposits, money market funds and commercial paper of $74.4 million and
short-term investments consisting of commercial paper, U.S. Treasury and agency
obligations and corporate bonds of $137.9 million.
Since inception and prior to our IPO, we financed our operations through cash
provided by operations, including payments received from customers using our
software products and services, and we did not raise any primary institutional
capital. The proceeds of our Series A and Series B redeemable convertible
preferred stock financings were used to repurchase shares of capital stock from
former stockholders. Upon the completion of our IPO in July 2018, we received
net proceeds of $264.6 million. We have generated significant operating losses
from our operations, as reflected by our accumulated deficit of $565.1 million
at December 31, 2019.
We typically invoice our customers annually in advance and, to a lesser extent,
multi-year in advance. Therefore, a substantial source of our cash is from such
prepayments, which are included on our consolidated balance sheets as deferred
revenue. Deferred revenue consists primarily of the unearned portion of billed
fees for our subscriptions and perpetual licenses, which is subsequently
recognized as revenue in accordance with our revenue recognition policy. At
December 31, 2019, we had deferred revenue of $363.1 million, of which $274.3
million was recorded as a current liability and is expected to be recorded as
revenue in the next 12 months, provided all other revenue recognition criteria
are met.
Our principal uses of cash in recent periods have been funding our operations,
expansion of our sales and marketing and research and development activities,
investments in infrastructure and acquiring complementary businesses and
technology. We expect to continue incurring operating losses and generating
negative cash flows from operations in the near-term; however, we believe that
our existing cash and cash equivalents and short-term investments will be
sufficient to fund our operating and capital needs for at least the next 12
months. Our future capital requirements will depend on many factors, including
our revenue growth rate, subscription renewal activity, the timing and extent of
spending to support further infrastructure and research and development efforts,
the timing and extent of additional capital expenditures to invest in new and
existing office spaces, the expansion of sales and marketing and international
operating activities, the timing of introduction of new product capabilities and
enhancements of our platform and the continuing market acceptance of our
platform. Capital expenditures related to our new corporate headquarters were
$11.4 million in 2019. In 2020, we expect capital expenditures related to our
new corporate headquarters to be approximately $16.0 million and we expect to
receive $12.5 million in tenant improvement reimbursements.
We may in the future enter into arrangements to acquire or invest in
complementary businesses, services and technologies, including intellectual
property rights. We may be required to seek equity or debt financing. In the
event that financing is required from outside sources, we may not be able to
raise it on terms acceptable to us or at all. If we are unable to raise
additional capital when desired, or if we cannot expand our operations or
otherwise capitalize on our business opportunities because we lack sufficient
capital, our business, operating results and financial condition would be
adversely affected.
Credit Facility
In May 2017, we entered into a $25.0 million revolving credit facility with
Silicon Valley Bank. Pursuant to the terms of the revolving credit facility, we
may issue up to $5.0 million of letters of credit, which reduce the total amount
available for borrowing under such facility. The revolving credit facility
terminates on May 4, 2020. To date, we have not borrowed any amounts under the
revolving credit facility.
Interest on borrowings under the revolving credit facility accrues at a variable
rate tied to the prime rate or the LIBOR rate, at our election. Interest is
payable quarterly in arrears. We are required to pay a quarterly commitment fee
that accrues at a rate of 0.25% per annum on the unused portion of the borrowing
commitment.
The revolving credit facility contains customary conditions to borrowing, events
of default and covenants, including restrictions on indebtedness, liens,
acquisitions and investments, restricted payments and dispositions. If, as of
the last

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day of any quarter, the outstanding balance of the revolving credit facility
exceeds $5.0 million, there are financial covenants that require us to maintain
a minimum level of earnings before income taxes, interest, depreciation and
amortization adjusted to add changes in deferred revenue in the period and a
minimum current ratio level. We were in compliance with all covenants under the
revolving credit facility at December 31, 2019.
Letter of Credit
On January 9, 2020, we entered into a $2.5 million standby letter of credit
("Letter of Credit") for the security deposit on our new headquarters lease. The
Letter of Credit bears interest at 2% per annum and expires one year from the
issue date, with automatic renewals for additional one year terms until the
final expiration date of February 2032. The Letter of Credit reduces the amount
available for borrowing under our revolving credit facility.
Cash Flows
The following table summarizes our cash flows for the periods presented:
                                                          Year Ended December 31,
(in thousands)                                       2019           2018    

2017


Net cash used in operating activities            $  (10,744 )   $   (2,559 )   $   (6,266 )
Net cash used in investing activities              (113,050 )     (123,221 )       (2,755 )
Net cash provided by financing activities            34,161        264,749  

2,091


Effect of exchange rate changes on cash and cash
equivalents and restricted cash                      (1,080 )       (1,063 )          (68 )
Net (decrease) increase in cash and cash
equivalents and restricted cash                  $  (90,713 )   $  137,906

$ (6,998 )




Operating Activities
In 2019, net cash used in operating activities was $10.7 million, which
primarily consisted of our $99.0 million net loss, adjusted for stock-based
compensation expense of $41.6 million and depreciation and amortization of $6.9
million, as well as a net cash inflow of $36.3 million from changes in operating
assets and liabilities. The net inflow from changes in operating assets and
liabilities was primarily due to a $72.8 million increase in deferred revenue
primarily due to increased subscription sales, as a majority of our customers
are invoiced in advance, partially offset by a $25.9 million increase in
accounts receivable and a $12.8 million increase in deferred commissions.
In 2018, net cash used in operating activities was $2.6 million, which primarily
consisted of our $73.5 million net loss, adjusted for stock-based compensation
expense of $22.9 million and depreciation and amortization of $6.2 million, as
well as a net cash inflow of $41.4 million from changes in operating assets and
liabilities. The net inflow from changes in operating assets and liabilities was
primarily due to a $64.1 million increase in deferred revenue, primarily due to
increased subscription sales, as a majority of our customers are invoiced in
advance, partially offset by a $17.4 million increase in accounts receivable.
In 2017, net cash used in operating activities was $6.3 million, which primarily
consisted of our $41.0 million net loss, adjusted for stock-based compensation
expense of $7.8 million and depreciation and amortization of $4.7 million, as
well as a net cash inflow of $23.1 million from changes in operating assets and
liabilities. The net inflow from operating assets and liabilities was primarily
due to an increase of $63.4 million in deferred revenue, including the
cumulative impact of adopting ASC 606, from increased subscription sales as a
majority of our customers are invoiced in advance, partially offset by a $14.8
million increase in accounts receivable. In addition, deferred commissions
increased $20.1 million, including the cumulative impact of adopting ASC 606.
Investing Activities
From 2018 to 2019, net cash used in investing activities decreased by $10.2
million, primarily due to a decrease in our purchase, net of sales, of
investments of $100.0 million, partially offset by cash paid for acquisitions of
$74.9 million and capital expenditures for our new corporate headquarters of
$11.4 million.

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From 2017 to 2018, net cash used in investing activities increased by $120.5
million, primarily due to our purchase of short-term investments of commercial
paper, U.S. Treasury securities and corporate bonds of $117.5 million.
Financing Activities
From 2018 to 2019, net cash provided by financing activities decreased by $230.6
million, primarily due to proceeds from our IPO, net of underwriting discounts
and commissions, of $268.5 million, less payments of offering costs related to
our IPO of $3.9 million in 2018, partially offset by proceeds from the exercise
of stock options of $19.0 million and stock issued in connection with the
employee stock purchase plan of $15.1 million in 2019.
From 2017 to 2018, net cash provided by financing activities increased by $262.7
million, primarily due to proceeds from our IPO, net of underwriting discounts
and commissions, less payments of offering costs related to our IPO.
Contractual Obligations
The following table summarizes our contractual obligations at December 31, 2019:
                                         Less than 1                                          More than 5
(in thousands)              Total            year          1 - 3 years       3 - 5 years         years
Operating lease
commitments              $   84,454     $      5,308     $      13,988     $      14,207     $     50,951
Non-cancellable purchase
obligations                   5,693            3,589             2,104                 -                -
Total contractual
obligations              $   90,147     $      8,897     $      16,092     $      14,207     $     50,951


Not included in the table above is $7.2 million of unrecognized tax benefits and
$1.2 million of asset retirement obligations, because the timing of future cash
outflows is uncertain.
Off-Balance Sheet Arrangements
At December 31, 2019, we did not have any relationships with unconsolidated
organizations or financial partnerships, such as structured finance or special
purpose entities, which would have been established for the purpose of
facilitating off-balance sheet arrangements or other contractually narrow or
limited purposes.
Critical Accounting Policies and Estimates
Our financial statements are prepared in accordance with U.S. GAAP. The
preparation of these financial statements requires us to make estimates and
assumptions that affect the reported amounts of assets, liabilities, revenue and
expenses, as well as related disclosures. We evaluate our estimates and
assumptions on an ongoing basis. Our estimates are based on historical
experience and various other assumptions that we believe to be reasonable under
the circumstances. Our actual results could differ from these estimates.
The critical accounting estimates, assumptions and judgments that we believe
have the most significant impact on our consolidated financial statements are
described below.
Revenue Recognition
We early adopted ASC 606 on January 1, 2017 using the modified retrospective
method and applying the guidance to all contracts as of January 1, 2017.
The core principle of ASC 606 is that revenue should be recognized to depict the
transfer of promised goods or services to customers in an amount that reflects
the consideration to which the entity expects to be entitled in exchange for
those goods or services. To achieve the core principle of ASC 606, we apply the
following steps:
• Identify the contract with a customer


• Identify the performance obligations in the contract

• Determine the transaction price


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• Allocate the transaction price to the performance obligations in the contract

• Recognize revenue when or as performance obligations are satisfied




In situations where we enter into a contractual arrangement that includes
non-standard terms and conditions, such as acceptance provisions and options to
purchase additional products and services, as well as contract modifications, we
apply judgment in identifying and assessing the impact on revenue recognition.
We generate revenue from subscription arrangements for our software and
cloud-based solutions, perpetual licenses, maintenance associated with perpetual
licenses and professional services and other revenue.
Subscription Revenue
Our subscription arrangements generally have annual or multi-year contractual
terms and allow customers to use our software or cloud solutions, including
ongoing software updates and the ability to identify the latest cybersecurity
vulnerabilities. Revenue is recognized ratably over the subscription term given
the critical utility provided by the ongoing updates that are released
throughout the contract period.
Perpetual License and Maintenance Revenue
Our perpetual licenses are generally sold with one or more years of maintenance,
which include ongoing software updates and the ongoing ability to identify the
latest cybersecurity vulnerabilities. Given the critical utility provided by the
ongoing software updates and updated ability to identify network vulnerabilities
included in maintenance, we combine the perpetual license and the maintenance
into a single performance obligation. Perpetual license arrangements generally
contain a material right related to the customer's ability to renew maintenance
at a price that is less than the initial license fee. We apply a practical
alternative to allocating a portion of the transaction price to the material
right performance obligation and estimate a hypothetical transaction price which
includes fees for expected maintenance renewals based on the estimated economic
life of the perpetual license contracts. We allocate the transaction price
between the cybersecurity subscription provided in the initial contract and the
material right related to expected contract renewals based on the hypothetical
transaction price. We recognize the amount allocated to the combined license and
maintenance performance obligation over the initial contractual period, which is
generally one year. We recognize the amount allocated to the material right over
the expected maintenance renewal period, which begins at the end of the initial
contractual term and is generally four years. We have estimated the five-year
economic life of perpetual license contracts based on historical contract
attrition, expected renewal periods, the lifecycle of the our technology and
other factors. While we believe that the estimates we have made are reasonable
and appropriate, different assumptions and estimates could materially impact our
reported financial results.
Professional Services and Other Revenue
Professional services and other revenue is primarily comprised of advisory
services and training related to the deployment and optimization of our
products. These services do not result in significant customization of our
products. Professional services and other revenue is recognized as the services
are performed.
Contracts with Multiple Performance Obligations
In cases where our contracts with customers contain multiple performance
obligations, the contract transaction price is allocated on a relative
standalone selling price basis. We typically determine standalone selling price
based on observable selling prices of our products and services.
Variable Consideration
We record revenue from sales at the net sales price, which is the transaction
price, including estimates of variable consideration when applicable. Certain of
our customers may be entitled to receive credits and in certain circumstances,
refunds, if service level commitments are not met. We have not historically
experienced significant incidents affecting the ability to meet these service
level commitments and any estimated refunds related to these agreements have not
been material.

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Sales through our channel partner network of distributors and resellers are
generally discounted as compared to the price that we would sell to an end user.
Revenue for sales through our channel network, which is fixed, is recorded net
of any distributor or reseller margin.
Deferred Commissions
Sales commissions, including related incremental fringe benefit costs, are
considered to be incremental costs of obtaining a contract, and therefore are
deferred over an estimated period of benefit, which ranges between three and
four years for subscription arrangements and five years for perpetual license
arrangements. We have estimated the period of benefit based on the expected
contract term including renewal periods, the lifecycle of our technology and
other factors. Sales commissions on contract renewals are capitalized and
amortized ratably over the contract term, with the exception of contracts with
renewal periods that are one year or less, in which case the incremental costs
are expensed as incurred. While we believe that the estimates we have made are
reasonable and appropriate, different assumptions and estimates could materially
impact our reported financial results.
Stock-Based Compensation
Stock-based compensation expense related to our stock options, restricted stock,
restricted stock units, or RSUs, and purchase rights issued under our 2018
Employee Stock Purchase Plan, or the 2018 ESPP, is calculated based on the fair
value of the awards granted and is recognized on a straight-line basis over the
requisite service period, which is generally two to four years, with the
exception of RSUs that include performance-based vesting conditions and are
expensed using the accelerated attribution method. We account for forfeitures as
they occur.
Estimating the fair value of stock options and purchase rights under the 2018
ESPP using the Black-Scholes option-pricing model requires assumptions as to the
fair value of our underlying common stock, the estimated term of the option, the
risk free interest rates, the expected volatility of the price of our common
stock and the expected dividend yield. The assumptions used to estimate the fair
value of the option awards reflect our best estimates. If any of the assumptions
change significantly, stock-based compensation for future awards may differ
significantly compared with the awards granted previously.
The assumptions and estimates are as follows:
• Fair Value of Common Stock. See "Common Stock Valuations" discussion below.


•      Expected Term. This is the period of time that the options granted are
       expected to remain unexercised. We employ the simplified method to
       calculate the average expected term.

• Volatility. This is a measure of the amount by which a financial variable,

such as a share price, has fluctuated (historical volatility) or is

expected to fluctuate (expected volatility) during a period. As we do not

yet have sufficient history of our own volatility, we have identified


       several public entities of similar size, complexity and stage of
       development and estimate volatility based on the volatility of these
       companies.


•      Risk-Free Interest Rate. This is the U.S. Treasury rate, having a term
       that most closely resembles the expected life of the stock option.


•      Dividend Yield. We have not and do not expect to pay dividends on our
       common stock.


Common Stock Valuations
Following our IPO, we use the market price of our common stock at the date of
grant as the fair value. Prior to our IPO, the lack of an active public market
for our common stock required our board of directors to exercise reasonable
judgment and consider a number of factors in order to make the best estimate of
fair value of our common stock, in accordance with the technical practice-aid
issued by the American Institute of Certified Public Accountants Practice Aid
entitled Valuation of Privately-Held Company Equity Securities Issued as
Compensation. Factors considered in connection with estimating the fair value of
our common stock underlying our award of restricted stock and stock option
awards when performing the fair value calculations with the Black Scholes
option-pricing model included:
• The results of independent third-party valuations of our common stock



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•      Recent arm's length transactions involving the sale or transfer of our
       common stock


•      The rights, preferences and privileges of our Series A and Series B

redeemable convertible preferred stock relative to those of our common

stock

• Our historical financial results and future financial projections

• The market value of equity interests in substantially similar businesses,

which equity interests can be valued through nondiscretionary, objective

means

• The lack of marketability of our common stock




•      The likelihood of achieving a liquidity event, such as an IPO given
       prevailing market conditions

• Industry outlook




•      General economic outlook including economic growth, inflation and
       unemployment, interest rate environment and global economic trends


As described above, the exercise price of our stock option awards was determined
by our board of directors, with input from management, taking into account the
factors described above, using a combination of valuation methodologies with
varying weighting applied to each methodology as of the grant date.
Application of these approaches involved the use of estimates, judgment and
assumptions that were highly complex and subjective, such as those regarding our
expected future revenue, expenses and future cash flows, discount rates, market
multiples, the selection of comparable companies and the probability of possible
future events. Changes in any or all of these estimates and assumptions or the
relationships between those assumptions would have impacted our valuations as of
each valuation date and may have had a material impact on the valuation of our
common stock.
The fair value of each stock option was estimated on the grant date based on the
following assumptions:
                            Year Ended December 31,
                             2018            2017
Expected term (in years)      6.3             6.3

Expected volatility 41.3% - 43.3% 45.2% - 47.0% Risk-free interest rate 2.7% - 2.9% 1.9% - 2.4% Expected dividend yield -

               -
Expected forfeiture rate       -               -


The fair value of each 2018 ESPP purchase right was estimated on the offering or modification dates based on the following assumptions:


                            Year Ended December 31,
                             2019            2018

Expected term (in years) 0.5 - 2.0 0.6 - 2.1 Expected volatility 34.4% - 44.6% 31.9% - 33.5% Risk-free interest rate 1.5% - 2.5% 2.3% - 2.7% Expected dividend yield -

               -


Business Combinations
We account for business combinations by recognizing the fair value of acquired
assets and liabilities. The excess purchase consideration over the fair value of
acquired assets and liabilities is recorded as goodwill. When determining the
fair value of assets acquired and liabilities assumed, we make estimates and
assumptions, especially with respect to intangible assets. Estimates in valuing
certain identifiable intangible assets require significant judgment and include,
but are not limited to, expected long-term market growth, future expected
operating expenses, costs of capital, and appropriate discount rates. Our
estimate of fair value is based upon assumptions we believe to be reasonable,
but which are inherently uncertain and, as a result, actual results may differ
from estimates. During the measurement period, we

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may make adjustments to the fair value of assets acquired and liabilities
assumed, with offsetting adjustments to goodwill. Any adjustments made after the
measurement period will be reflected in the consolidated statements of
operations. Acquisition-related transaction costs are expensed as incurred.
Income Taxes
We are subject to federal, state and local taxes in the United States as well as
numerous international jurisdictions. These foreign jurisdictions have different
statutory tax rates than the United States. Earnings generated by our
international entities are related to transfer pricing requirements as
applicable under local jurisdiction tax laws.
We record a provision for income taxes under the asset and liability method,
which requires recognition of deferred tax assets and liabilities for the
expected future tax consequences of temporary differences between the financial
statement carrying amounts and the tax basis of existing assets and liabilities,
net operating loss carryforwards and tax credit carryforwards. Deferred tax
assets and liabilities are measured using the tax rates that are expected to
apply to taxable income for the years in which those tax assets and liabilities
are expected to be realized or settled. A valuation allowance is provided if it
is more likely than not that some or all of the deferred tax assets will not be
realized. We have valuation allowances in all jurisdictions against deferred tax
assets net of deferred tax liabilities that will reverse and provide a source of
taxable income. Our evaluation of valuation allowances could change in the
future and the impact could have a material impact on our financial statements.
We recognize tax benefits from an uncertain tax position if it is more likely
than not to be sustained upon audit by the relevant taxing authority. Interest
and penalties associated with such uncertain tax positions are classified as a
component of income tax expense.
In December 2019, subsequent to our acquisition of Indegy Ltd. we transferred
the acquired Indegy intellectual property through an intercompany transaction.
The valuation of Indegy's intellectual property for tax purposes resulted in
$6.3 million of current tax expense and $4.2 million of deferred tax expense in
Israel. The valuation of the intellectual property for tax purposes required
significant judgment and assumptions with respect to forecasted operating
results and discount rates.
The Tax Cuts and Jobs Act, or the 2017 Tax Act, was enacted into law, which
contains several significant changes to how corporations are taxed in the United
States, including the reduction of the corporate income tax rate from 35% to 21%
effective January 1, 2018. The new legislation also includes a variety of other
changes, such as a one-time repatriation tax on accumulated foreign earnings, or
transition tax, acceleration of business asset expensing and reduction in the
amount of executive pay that could qualify as a tax deduction.
The 2017 Tax Act also included international tax provisions that will affect the
Company, including the favorable tax regime for taxing foreign derived
intangible income. Additional international provisions include the global
intangible low taxed income, or GILTI, regime and the base erosion anti-abuse
tax.
Depending on the jurisdiction, distributions of earnings could be subject to
withholding taxes at rates applicable to the distributing jurisdiction. As we
intend to continue to reinvest the earnings of foreign subsidiaries
indefinitely, we have not provided for a U.S. income tax liability and foreign
withholding taxes on undistributed foreign earnings of foreign subsidiaries.
Recently Issued Accounting Pronouncements
Refer to Note 1 to our consolidated financial statements in this Annual Report
on Form 10-K for more information regarding recently issued accounting
pronouncements.
Item 7A.  Quantitative and Qualitative Disclosures about Market Risk
We are exposed to market risks in the ordinary course of our business, including
interest rate, foreign currency exchange and inflation risks.

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Interest Rate Risk
At December 31, 2019, we had cash and cash equivalents of $74.4 million,
consisting of cash deposits, money market funds and commercial paper. We also
had short-term investments of $137.9 million, consisting of commercial paper,
U.S. Treasury securities and corporate bonds. Our investments are carried at
their fair market value with cumulative unrealized gains or losses recorded as a
component of accumulated other comprehensive income within stockholders' equity.
The primary objectives of our investment activities are the preservation of
capital, the fulfillment of liquidity needs and the fiduciary control of cash
and investments. We do not enter into investments for trading or speculative
purposes. Interest-earning instruments carry a degree of interest rate risk;
however, a hypothetical 10% change in interest rates during any of the periods
presented would not have had a material impact on our financial statements.
We have not had any borrowings outstanding under the revolving credit facility
since it was established in May 2017. Any borrowings under the revolving credit
facility would bear interest at a variable rate tied to the prime rate or the
LIBOR rate. We do not have any other long-term debt or financial liabilities
with floating interest rates that would subject us to interest rate
fluctuations.
On January 9, 2020, we entered into a $2.5 million standby letter of credit
("Letter of Credit") for the security deposit on our new headquarters lease. The
Letter of Credit bears interest at 2% per annum and expires one year from the
issue date, with automatic renewals for additional one year terms until the
final expiration date of February 2032. The Letter of Credit reduces the amount
available for borrowing under our revolving credit facility.
Foreign Currency Exchange Risk
Substantially all of our sales contracts are denominated in U.S. dollars, with a
limited number of contracts denominated in foreign currencies. A portion of our
operating expenses, including foreign denominated leases, are incurred outside
the United States, denominated in foreign currencies and subject to fluctuations
due to changes in foreign currency exchange rates, particularly changes in the
Euro, British Pound and Australian dollar. Additionally, fluctuations in foreign
currency exchange rates may cause us to recognize remeasurement and transaction
gains (losses) in our consolidated statements of operations. As the impact of
foreign currency exchange rates has not been material to our historical
operating results, we have not entered into derivative or hedging transactions,
but we may do so in the future if our exposure to foreign currency becomes more
significant.
Inflation Risk
We do not believe that inflation has had a material effect on our business,
results of operations, or financial condition. Nonetheless, if our costs were to
become subject to significant inflationary pressures, we may not be able to
fully offset such higher costs. Our inability or failure to do so could harm our
business, results of operations, or financial condition.

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