The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our condensed consolidated
financial statements and the related notes and other financial information
included elsewhere in this Quarterly Report on Form 10-Q and our Annual Report
on Form 10-K for the fiscal year ended December 31, 2020 filed with the
Securities and Exchange Commission (the "SEC") on February 25, 2021 (the "Annual
Report"). In addition to historical consolidated financial information, the
following discussion contains forward-looking statements that reflect our plans,
estimates, and beliefs. Our actual results could differ materially from those
discussed in the forward-looking statements. You should review the sections
titled "Special Note Regarding Forward-Looking Statements" for a discussion of
forward-looking statements and in Part II, Item 1A, "Risk Factors" for a
discussion of factors that could cause actual results to differ materially from
the results described in or implied by the forward-looking statements contained
in the following discussion and analysis and elsewhere in this Quarterly Report
on Form 10-Q and in our Annual Report.

Overview



We are a growing cancer genomics company transforming the development of
next-generation therapies by providing more comprehensive molecular data about
each patient's cancer and immune response. We designed our NeXT Platform to
adapt to the complex and evolving understanding of cancer, providing our
biopharmaceutical customers with information on all of the approximately 20,000
human genes, together with the immune system, in contrast to many cancer panels
that cover roughly only 50 to 500 genes. In parallel with the development of our
platform technology, we have also pursued business within the population
sequencing market, and we have provided whole genome sequencing services under
contract with the U.S. Department of Veterans Affairs (the "VA") Million Veteran
Program (the "VA MVP"), which has enabled us to innovate, scale our operational
infrastructure, and achieve greater efficiencies in our lab. We delivered the
125,000th whole human genome sequence dataset to the VA MVP in June 2021 with
over 50,000 of these genomes delivered in the past 12 months alone. In September
2020, we announced receipt of a new task order from the VA MVP with an
approximate value of up to $31 million. The cumulative value of task orders
received from the VA MVP since inception is approximately $176 million,
approximately $159.2 million of which we had recognized as revenue as of June
30, 2021.

In August 2020, we launched NeXT Liquid Biopsy, which is a liquid biopsy assay
that analyzes all of the approximately 20,000 human genes versus the more
narrowly focused liquid biopsy assays that are currently available. By combining
technological innovation, operational scale, and regulatory differentiation, our
NeXT Platform is designed to help our customers obtain new insights into the
mechanisms of response and resistance to therapy as well as new potential
therapeutic targets. Our platform enhances the ability of biopharmaceutical
companies to unlock the potential of conducting translational research in the
clinic rather than with pre-clinical animal models or cancer cell lines. We also
announced in January 2020 a diagnostic test, NeXT Dx Test, which is based on our
NeXT Platform, that we envision being used initially by both leading clinical
cancer centers as well as biopharmaceutical companies. Most recently, in
December 2020, we launched two new capabilities that are integrated into our
NeXT Platform: our Systemic HLA Epitope Ranking Pan Algorithm ("SHERPA") machine
learning-based tool for the comprehensive identification and characterization of
cancer neoantigens, as well as our Neoantigen Presentation Score ("NEOPS") for
predicting cancer immunotherapy response. SHERPA enables the development of new
neoantigen-based diagnostic biomarkers, such as our NEOPS, and novel
personalized therapies.

On January 29, 2021, we completed a follow-on equity offering in which we issued
and sold 3,950,000 shares of common stock at a public offering price of $38.00
per share. We received net proceeds of $141.1 million after deducting
underwriting discounts and commissions. The underwriters exercised their option
to purchase an additional 592,500 shares shortly thereafter, resulting in
additional net proceeds to us of $21.2 million after deducting underwriting
discounts and commissions. In total, we raised net proceeds of $162.3 million
after deducting underwriting discounts and commissions. We also incurred $0.3
million of offering costs, including legal, accounting, printing and other
offering-related costs.

Our operations have been impacted by the ongoing COVID-19 pandemic. As of June
15, 2021, the Governor of California terminated executive orders that put into
place the Stay Home Order and the Blueprint for a Safer Economy. The Governor
also phased out the vast majority of executive actions put in place since March
2020 as part of the pandemic response. We had previously substantially closed
our office facilities and limited access to our laboratory facilities to protect
our employees and to comply with the now-terminated health orders. We are
beginning to welcome back a select number of employees to our office facilities,
consistent with our latest health and safety protocols and applicable government
regulations and guidance. The previous shelter-in-place order and health orders
have negatively impacted productivity, disrupted our business, and slowed
research and development activities due to us limiting access to our laboratory
space that would otherwise be used by our research and development group, and,
to the extent such orders return in similar or more stringent form, they may
continue to cause such effects on our operations. The health orders have
disrupted, and may continue to disrupt if they return in similar or more
stringent form, the ability of our suppliers to fulfill our purchase orders in a
timely manner or at all. Additionally, we are aware of increased demand in the
market for certain consumables used in COVID-19 test kits and vaccines. We use
such consumables in our operations, and we have faced, and may face in the
future, difficulties in acquiring such consumables if our suppliers prioritize
orders related to COVID-19. Several of our customers, including the VA MVP, were
delayed in sending us samples in the prior year due to the inability to collect
or ship samples during the COVID-19 pandemic, and these and additional customers
may be disrupted from collecting samples or sending purchase orders and samples
to us in the future. Many of our customers, potential customers and potential
partners have also put in place policies restricting visitors from other
companies, and therefore our sales team and members of management have been
unable to meet such parties in person, which may result in reduced acquisition
of new customers, fewer orders from existing customers, and fewer potential
partnering opportunities. We have yet to see a return to pre-pandemic conditions
on this front. If a COVID-19 outbreak were to occur among our

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laboratory employees, we may significantly curtail our laboratory operations or
pause operations altogether until the imminent health risk to our employees
subsided. Such disruptions in our operations, and our customers' and suppliers'
operations, may continue to adversely affect revenue and operating results.

The global COVID-19 pandemic continues to rapidly evolve and to present serious
health risks. While authorities in many areas have lifted or relaxed
pandemic-related restrictions, in some cases they have subsequently re-imposed
various restrictions after observing an increased rate of COVID-19 cases; for
example, in December 2020, state and local authorities in California reinstated
shelter-in-place orders in light of the increasing rate of COVID-19 cases and
shortage of intensive care unit beds across the state. More recently, in July
2021, the County of San Mateo issued a formal recommendation to wear a mask
indoors as precaution against COVID-19 amidst a rise in local COVID-19 cases and
increased circulation of the Delta variant and, on August 2, 2021, the County
issued a new health order requiring all individuals to wear face coverings when
indoors in workplaces and public settings regardless of vaccination status, with
certain limited exceptions. Our primary operations and headquarters are located
in San Mateo County. There is no guarantee when or if all such restrictions and
recommendations will be eliminated, such that we and our customers,
manufacturers and suppliers will be able to safely resume operations consistent
with our pre-COVID-19 operations. Vaccines against COVID-19 have been approved
by the FDA and other regulatory authorities for emergency use, but there is
uncertainty as to how quickly and to what extent the vaccines will impact the
COVID-19 pandemic.

While the extent of the impact of the current COVID-19 pandemic on our business
and financial results is uncertain, a continued and prolonged public health
crisis such as the COVID-19 pandemic could have a material negative impact on
our business, financial condition, and operating results.

Components of Operating Results

Revenue



We derive our revenue primarily from sequencing and data analysis services to
support the development of next-generation cancer therapies and to support
large-scale genetic research programs. We support our customers by providing
high-accuracy, validated genomic sequencing and advanced analytics. Many of
these analytics are related to state-of-the-art biomarkers, including those
relevant to immuno-oncology therapeutics such as checkpoint inhibitors.

Our revenue is primarily generated through contracts with companies in the
pharmaceutical industry, healthcare organizations, and government entities. Our
ability to increase revenue will depend on our ability to further penetrate this
market. To do this, we are developing a growing set of state-of-the-art
products, advancing our operational infrastructure, expanding our international
presence, building our regulatory credentials, and expanding our targeted
marketing efforts. Unlike diagnostic or therapeutic companies, we have not to
date sought reimbursement through traditional healthcare payors. We sell through
a small direct sales force.

We derive a substantial portion of our current and expected future revenue from
sales of our DNA sequencing and data analysis services to the VA MVP. Our
contract with the VA MVP does not include specific testing turnaround times.
Therefore, we have the ability to modulate the volume of samples processed for
the VA MVP up or down to complement sample volumes from all other customers,
which can vary from period to period.

We have one reportable segment from the sale of sequencing and data analysis
services. Substantially all of our revenue to date has been derived from sales
in the United States.

Costs and Expenses

Cost of Revenue

Cost of revenue consists of raw materials costs, personnel costs (salaries,
bonuses, stock-based compensation, payroll taxes, and benefits), laboratory
supplies and consumables, depreciation and maintenance on equipment, and
allocated facilities and information technology ("IT") costs. We expect cost of
revenue to increase as our revenue grows, and in the short term cost of revenue
may outpace revenue growth as we invest in expanding our laboratory capacity,
but over time the cost per sample processed is expected to decrease due to
economies of scale we may gain as volume increases, automation initiatives, and
other cost reductions.

Research and Development Expenses



Research and development expenses consist of costs incurred for the research and
development of our products. These expenses consist primarily of personnel costs
(salaries, bonuses, stock-based compensation, payroll taxes, and benefits),
laboratory supplies and consumables, costs of purchasing samples for research
purposes, depreciation and maintenance on equipment, and allocated facilities
and IT costs. We include in research and development expenses the costs to
further develop software we use to operate our laboratory, analyze the data it
generates, and automate our operations. These expenses also include costs
associated with our collaborations, which we expect to increase over time.

We expense our research and development expenses in the period in which they are incurred. We expect to increase our research and development expenses as we continue to develop new products.


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Selling, General and Administrative Expenses



Selling expenses consist of personnel costs (salaries, commissions, bonuses,
stock-based compensation, payroll taxes, and benefits), customer support
expenses, direct marketing expenses, and market research. Our general and
administrative expenses include costs for our executive, accounting, finance,
legal, and human resources functions. These expenses consist of personnel costs
(salaries, bonuses, stock-based compensation, payroll taxes, and benefits),
corporate insurance, audit and legal expenses, consulting costs, and allocated
facilities and IT costs. We expense all selling, general and administrative
expenses as incurred.

We expect our selling expenses will continue to increase in absolute dollars,
primarily driven by our efforts to expand our commercial capability and to
expand our brand awareness and customer base through targeted marketing
initiatives with an increased presence both within and outside the United
States. We also expect general and administrative expenses to increase as we
scale our operations.

Interest Income and Interest Expense



Interest income consists primarily of interest earned on our cash and cash
equivalents and short-term investments. Since the first quarter of 2020, our
interest income has been adversely impacted by declines in yields on debt
securities. While our average balances of cash and cash equivalents and
short-term investments have increased as compared to the same periods in the
prior year (due primarily to our follow-on equity offerings), we expect that our
interest income will not materially increase in the near future given the
current low interest-rate environment. Interest expense in the second quarter
and first six months of 2021 is the recognition of imputed interest on
noninterest bearing loans.

Other Income (Expense), Net

Other income (expense), net consists primarily of foreign currency exchange gains and losses, and realized gains or losses associated with sales of marketable securities. We expect our foreign currency gains and losses to continue to fluctuate in the future due to changes in foreign currency exchange rates.



Results of Operations

The following sets forth, for the periods presented, our unaudited condensed
consolidated statements of operations and selected financial data (in thousands,
except share and per share data):



                                             Three Months Ended June 30,          Six Months Ended June 30,
                                                2021               2020             2021              2020
Revenue                                    $        21,670     $     19,495     $      42,551     $     38,656
Costs and expenses
Cost of revenue                                     13,502           14,823            26,956           29,945
Research and development                            11,687            6,465            21,183           12,855
Selling, general and administrative                 11,428            7,705            21,849           14,979
Total costs and expenses                            36,617           28,993            69,988           57,779
Loss from operations                               (14,947 )         (9,498 )         (27,437 )        (19,123 )
Interest income                                        103              246               198              756
Interest expense                                       (65 )              -               (65 )             (2 )
Other income (expense), net                            (36 )              1               (48 )              9
Loss before income taxes                           (14,945 )         (9,251 )         (27,352 )        (18,360 )
Provision for income taxes                               8                4                 5               34
Net loss                                   $       (14,953 )   $     (9,255 )   $     (27,357 )   $    (18,394 )
Net loss per share, basic and diluted      $         (0.34 )   $      (0.29 )   $       (0.63 )   $      (0.58 )
Weighted-average shares outstanding,
basic and diluted                               43,960,794       31,731,628        43,113,195       31,538,329




                                                        June 30,       December 31,
                                                          2021             2020

Cash and cash equivalents, and short-term investments $ 328,907 $


 203,290
Working capital                                           320,222            180,083
Total assets                                              383,340            244,842
Long-term obligations                                      10,506              9,261
Total liabilities                                          44,593             49,897
Total stockholders' equity                                338,747            194,945


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Revenue

The following table shows revenue by customer type (in thousands):





                                 Three Months Ended June 30,           Change           Six Months Ended June 30,           Change
                                  2021                 2020                             2021                2020
VA MVP                       $       13,507       $       14,750        (8%)        $      26,717       $      29,506        (9%)
All other customers                   8,163                4,745        72%                15,834               9,150        73%
Total revenue                $       21,670       $       19,495        11%         $      42,551       $      38,656        10%



The following table shows concentration of revenue by customer:





                                                 Three Months Ended June 30,                  Six Months Ended June 30,
                                               2021                      2020              2021                      2020
VA MVP                                          62%                       76%               63%                       76%
Pfizer Inc.                                     15%                       10%               14%                        *
* Less than 10% of revenue




VA MVP

The decrease of $1.2 million and $2.8 million in revenue from the VA MVP during
the second quarter and first six months of 2021 was primarily due to a decrease
in the volume of samples we tested in each period. We expect the substantial
majority of our remaining backlog of $16.8 million with the VA MVP to be
converted into revenue during the next quarter.

All other customers



The increase of $3.4 million in revenue from all other customers during the
second quarter of 2021 was driven primarily by strong demand from large
pharmaceutical customers for our NeXT Platform products which resulted in an
increase in the volume of samples we tested during the period. Revenue derived
from our NeXT Platform products exceeded $4.5 million during the second quarter
of 2021 and was approximately $2.6 million in the second quarter of 2020. We
also recognized $0.3 million in additional revenue from our biobank customer in
the second quarter of 2021 as compared to the second quarter of 2020, as sample
receipts from the customer were sharply reduced in the second quarter of 2020
due to the COVID-19 pandemic.

The increase of $6.7 million in revenue from all other customers during the
first six months of 2021 was driven primarily by strong demand from large
pharmaceutical customers for our NeXT Platform products, which resulted in an
increase in the volume of samples we tested during the period. Revenue derived
from our NeXT Platform products exceeded $9.0 million during the first six
months of 2021 and was approximately $3.0 million during the same period of the
prior year.

Costs and Expenses



                                 Three Months Ended June 30,           Change           Six Months Ended June 30,           Change
                                  2021                 2020                             2021                2020
                                       (in thousands)                                        (in thousands)

Cost of revenue              $       13,502       $       14,823        (9%)        $      26,956       $      29,945       (10%)
Research and development             11,687                6,465        81%                21,183              12,855        65%
Selling, general and                                                    48%
administrative                       11,428                7,705                           21,849              14,979        46%
Total costs and expenses     $       36,617       $       28,993        26%         $      69,988       $      57,779        21%




Cost of revenue

The decreases in cost of revenue in the second quarter and first six months of
2021, as compared to the comparable year ago periods, was primarily due to
favorable customer mix and efficiencies within our laboratory operations. Raw
materials costs were lower, relative to revenue, for non-VA MVP customer orders,
resulting in favorable customer mix for the second quarter and first six months
of 2021. We also observed more efficient sample processing overall during each
period, including less labor and overhead required per sample processed, which
was favorable for both VA MVP and non-VA MVP orders.

The cost components related to the $1.3 million decrease in cost of revenue
during the second quarter of 2021 were a $0.7 million decrease in raw materials
due to the favorable customer mix, a $0.4 million decrease in indirect costs due
to a higher utilization of our laboratory for research and development
activities, and a $0.2 million decrease in the cost of laboratory supplies and
consumables.

The cost components related to the $3.0 million decrease in cost of revenue
during the first six months of 2021 were a $2.0 million decrease in raw
materials due to the favorable customer mix, a $0.8 million decrease in the cost
of laboratory supplies and consumables, and a $0.4 million decrease in indirect
costs due to a higher utilization of our laboratory for research and development
activities, which were partially offset by a $0.2 million increase in
personnel-related costs.

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Research and development



The $5.2 million increase in research and development during the second quarter
of 2021 was primarily due to the development of new products and lab automation
efforts and consisted of an increase of $3.6 million in personnel-related costs
primarily related to increased headcount, a $1.0 million increase in sample
processing costs incurred in our laboratory for new product development, a $0.5
million increase in IT and facilities costs, and a $0.1 million increase in
consulting fees.

The $8.3 million increase in research and development during the first six
months of 2021 was primarily due to development of new products and lab
automation efforts and consisted of an increase of $5.8 million in
personnel-related costs primarily related to increased headcount, a $1.2 million
increase in sample processing costs incurred in our laboratory for new product
development, a $1.1 million increase in IT and facilities costs, and a $0.2
million increase in consulting fees.

Selling, general and administrative



The $3.7 million increase in selling, general and administrative during the
second quarter of 2021 was primarily due to a $2.5 million increase in
personnel-related costs primarily related to increased headcount, a $0.6 million
increase in professional services (including corporate insurance, audit fees,
and legal expenses), and a $0.6 million charge in connection with the
modification of stock options held by a non-employee board member.

The $6.9 million increase in selling, general and administrative during the
first six months of 2021 was primarily due to a $5.0 million increase in
personnel-related costs primarily related to increased headcount, a $1.2 million
charge in connection with the modification of stock options held by two
non-employee board members, and a $0.9 million increase in professional services
(including corporate insurance, audit fees, and legal expenses), which were
partially offset by a $0.2 million decrease in travel-related costs due to
pandemic-related travel restrictions and other costs.

Interest Income, Interest Expense, and Other Income (Expense), Net





                                  Three Months Ended June 30,           Change           Six Months Ended June 30,          Change
                                  2021                  2020                             2021                 2020
Interest income               $         103         $         246       (58%)        $        198         $        756       (74%)
Interest expense                        (65 )                   -                             (65 )                 (2 )
Other income (expense), net             (36 )                   1                             (48 )                  9
Total                         $           2         $         247                    $         85         $        763

Interest income and interest expense



The decreases in interest income during the second quarter and first six months
of 2021 was driven by declines in yields on debt securities, partially offset by
higher average cash and investment balances subsequent to our follow-on equity
offerings in August 2020 and January 2021. Interest expense in the second
quarter and first six months of 2021 is the recognition of imputed interest on
noninterest bearing loans.

Other income (expense), net

Other expense for the second quarter and first six months of 2021 consisted of foreign currency transaction losses and remeasurements. Other income in the second quarter and first six months of 2020 consisted of foreign currency remeasurements.

Liquidity and Capital Resources

The following tables present selected financial information and statistics as of and for the six months ended June 30, 2021 and 2020 (in thousands):





                                                            As of June 30,
                                                          2021          2020
Cash and cash equivalents, and short-term investments   $ 328,907     $ 105,233
Property and equipment, net                                14,258        12,650
Contract liabilities                                       11,460        28,952
Working capital                                           320,222        77,084




                                              Six Months Ended June 30,
                                                 2021              2020

Net cash used in operating activities $ (37,674 ) $ (23,997 ) Net cash used in investing activities

             (129,649 )        (7,650 )
Net cash provided by financing activities          168,859           1,644




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From our inception through June 30, 2021, we have funded our operations
primarily from $279.0 million in net proceeds from our follow-on equity
offerings in January 2021 and August 2020, $144.0 million in net proceeds from
our IPO in June 2019, and $89.6 million from issuance of redeemable convertible
preferred stock, as well as cash from operations and debt financing. As of June
30, 2021, we held cash and cash equivalents in the amount of $70.1 million and
short-term investments in the amount of $258.8 million.

We have incurred net losses since our inception. We anticipate that our current
cash and cash equivalents and short-term investments, together with cash
provided by operating activities, are sufficient to fund our near-term capital
and operating needs for at least the next 12 months.

We have based these future funding requirements on assumptions that may prove to
be wrong, and we could utilize our available capital resources sooner than we
expect. If our available cash balances, net proceeds from the offerings and
anticipated cash flow from operations are insufficient to satisfy our liquidity
requirements, including because of lower demand for our services or other risks
described in this Quarterly Report on Form 10-Q, such as the COVID-19 pandemic,
we may seek to sell additional common or preferred equity or convertible debt
securities, enter into an additional credit facility or another form of
third-party funding or seek other debt financing. The sale of equity and
convertible debt securities may result in dilution to our stockholders and, in
the case of preferred equity securities or convertible debt, those securities
could provide for rights, preferences or privileges senior to those of our
common stock. The terms of debt securities issued or borrowings pursuant to a
credit agreement could impose significant restrictions on our operations.
Additional capital may not be available on reasonable terms, or at all.

Our short-term investments portfolio is primarily invested in highly rated securities, with the primary objective of minimizing the potential risk of principal loss. Our investment policy generally requires securities to be investment grade and limits the amount of credit exposure to any one issuer.



During the six months ended June 30, 2021, cash used in operating activities of
$37.7 million was a result of $27.4 million of net loss and the net negative
change in operating assets and liabilities of $21.8 million ($9.6 million of
which was related to reductions in outstanding customer prepayments as we
fulfilled the related revenue contracts, $5.0 million due to prepayments of
insurance and other service contracts, and $2.9 million due to an increase in
customer accounts receivables), partially offset by non-cash adjustments to net
income of $11.5 million (the most significant non-cash expenses for us in the
six months ended June 30, 2021 were $6.7 million of stock-based compensation and
$2.9 million of depreciation and amortization).

During the six months ended June 30, 2020, cash used in operating activities of
$24.0 million was a result of $18.4 million of net loss and the net negative
change in operating assets and liabilities of $12.1 million ($7.0 million of
which was related to reductions in outstanding customer prepayments as we
fulfilled the related revenue contracts), partially offset by non-cash
adjustments to net income of $6.5 million (the most significant non-cash
expenses for us in the six months ended June 30, 2020 were $3.1 million of
stock-based compensation and $2.8 million of depreciation and amortization).

During the six months ended June 30, 2021, cash used in investing activities of
$129.6 million was due to a $125.1 million net investment of cash into
short-term investments and $4.5 million acquisitions of property and equipment.
Cash provided by financing activities of $168.9 million during the same period
consisted of $162.3 million net proceeds from our January 2021 follow-on equity
offering, $5.1 million proceeds from loans, and $2.6 million proceeds from stock
option exercises and purchases under our ESPP, partially offset by $0.8 million
repayments of loans and $0.3 million of offering costs.

During the six months ended June 30, 2020, cash used in investing activities of
$7.7 million was due to a $6.8 million net investment of cash into short-term
investments and $0.9 million acquisitions of property and equipment. Cash
provided by financing activities of $1.6 million during the same period was the
proceeds from stock option exercises and purchases under our ESPP.

Material Cash Requirements



From time to time in the ordinary course of business, we enter into agreements
with vendors for the purchase of raw materials, laboratory supplies and
consumables to be used in the sequencing of customer samples. However, we
generally do not have binding and enforceable purchase orders beyond the short
term, and the timing and magnitude of purchase orders beyond such period is
difficult to accurately project.

We currently expect our capital expenditures to support our growth initiatives
globally to increase in 2021, as compared to capital expenditures in 2020. Such
expenditures are expected to consist primarily of laboratory equipment and
computer equipment. We anticipate fulfilling such expenditures with our existing
cash and cash equivalents and short-term investments, which amounted to $328.9
million as of June 30, 2021.

Our noncancelable operating lease payments were $15.9 million as of June 30,
2021. The timing of these future payments, by year, can be found in Part I, Item
1 of this Form 10-Q in the Notes to Condensed Consolidated Financial Statements
in Note 7, "Leases."

During the second quarter of 2021, we entered into two noninterest bearing loans
to finance the purchase of $5.5 million of computer hardware, internal use
software licenses, and related ongoing support. We made a payment of $0.8
million during the second quarter of 2021 and have a remaining payment of $1.04
million due in 2021. We are required to make payments of $1.84 million in each
of 2022 and 2023. Further discussion of this transaction can be found in Part I,
Item 1 of this Form 10-Q in the Notes to Condensed Consolidated Financial
Statements in Note 6, "Loans."

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Certain of our customers prepay us for a portion of the services that they
expect to order from us before they place purchase orders and we deliver those
services. In some cases, this prepayment can be substantial and may be paid
months or a year or more in advance of these customers providing samples to us
and before our delivery of the services to which some or all of the deposit
relates. As of June 30, 2021, we had approximately $11.5 million in customer
deposits, including $10.5 million from one customer. We are generally not
required by our contracts to retain these deposits in cash or otherwise and we
have generally used these deposits to make capital expenditures and fund our
operations. When a customer that has prepaid us for future services cancels its
contract with us, reduces the level of services that it expects to receive, or
we determine that a prepayment is no longer necessary, we will repay that
customer's deposit. We do not expect such repayments to require material amounts
of cash.

Critical Accounting Policies and Estimates



Our condensed consolidated financial statements are prepared in accordance with
U.S. GAAP. The preparation of these condensed consolidated financial statements
requires us to make estimates and assumptions that affect the reported amounts
of assets, liabilities, revenue, costs and expenses, and related disclosures.
Our estimates are based on our historical experience and on various other
factors that we believe are reasonable under the circumstances, the results of
which form the basis for making judgments about the carrying value of assets and
liabilities that are not readily apparent from other sources. Actual results may
differ from these estimates under different assumptions or conditions.

An accounting policy is deemed to be critical if it requires an accounting
estimate to be made based on assumptions about matters that are highly uncertain
at the time the estimate is made, if different estimates reasonably could have
been used, or if changes in the estimate that are reasonably possible could
materially impact the financial statements. We believe that the assumptions and
estimates associated with revenue recognition and stock-based compensation have
the greatest potential impact on our condensed consolidated financial
statements. Therefore, we consider these to be our critical accounting policies
and estimates.

There have been no material changes to our critical accounting policies and estimates as compared to the critical accounting policies and estimates described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020 under the caption "Critical Accounting Policies and Estimates" in Management's Discussion and Analysis of Financial Condition and Results of Operations, set forth in Part II, Item 7.

JOBS Act Accounting Election



We are an emerging growth company, as defined in the Jumpstart Our Business
Startups Act (the "JOBS Act"). Under the JOBS Act, emerging growth companies can
delay adopting new or revised accounting standards issued subsequent to the
enactment of the JOBS Act until such time as those standards apply to private
companies. We have irrevocably elected not to avail ourselves of this exemption
from new or revised accounting standards, and therefore, we will be subject to
the same new or revised accounting standards as other public companies that are
not emerging growth companies.

Recent Accounting Pronouncements

See the sections titled "Summary of Significant Accounting Policies-Recent Accounting Pronouncements" and "-Recent Accounting Pronouncements Not Yet Adopted" in Note 2 to our unaudited condensed consolidated financial statements for additional information.

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