The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our unaudited condensed
consolidated financial statements and related notes appearing elsewhere in this
Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the year
ended December 31, 2020, as filed with the SEC ("2020 Form 10-K"). Some of the
information contained in this discussion and analysis or set forth elsewhere in
this Quarterly Report on Form 10-Q, including information with respect to our
plans and strategy for our business, includes forward-looking statements that
involve risks and uncertainties. As a result of many factors, including those
factors set forth in "Item 1.A. Risk Factors" section of our 2020 Form 10-K, our
actual results could differ materially from the results described in or implied
by the forward-looking statements contained in the following discussion and
analysis.

Overview


We have developed an innovative suite of purpose-built handheld and desktop mass
spectrometry, or Mass Spec, devices for the point-of-need. Leveraging our
proprietary platform technology, we make the extraordinary analytical power of
Mass Spec available in devices that are significantly smaller and more
accessible than conventional laboratory instruments. Our Mass Spec devices are
used at the point-of-need to interrogate unknown and invisible materials and
provide quick, actionable answers to directly address some of the most critical
problems in life sciences research, bioprocessing, industrial biotech, forensics
and adjacent markets.

We create simplified measurement devices that our customers can use as accurate
tools where and when their work needs to be done, rather than overly complex and
centralized analytical instrumentation. We believe the insights and answers our
devices provide will accelerate workflows, reduce costs, and offer
transformational opportunities for our end users.

Front-line workers rely upon our handheld devices to combat the opioid crisis
and detect counterfeit pharmaceuticals and illicit materials in the air or on
surfaces at levels 1,000 times below their lethal dose. Our desktop devices are
accelerating development and production of biotherapeutics by identifying and
quantifying extracellular species in bioprocessing critical to cell health and
productivity. They sit alongside bioreactors and fermenters producing drug
candidates, functional proteins, cell and gene therapies, and synthetic biology
derived products. We believe the insights and answers our devices provide
accelerate workflows, reduce costs, and offer transformational opportunities for
our end users. The term "products" as used in this "Management's Discussion and
Analysis of Financial Condition and Results of Operations" refers to the MX908,
Rebel and ZipChip Interface.

Since inception, we have focused substantially all of our resources on
designing, developing and building our proprietary Mass Spec platform and
associated technologies, supporting software improvements and data analysis,
organizing and staffing our company, planning our business, raising capital, and
providing general and administrative support for these operations. To date, we
have funded our operations primarily with proceeds from sales of preferred stock
and borrowings under loan agreements and, most recently, with proceeds from our
initial public offering, or IPO. On December 22, 2020, we completed our IPO,
pursuant to which we issued and sold 7,475,000 shares of common stock, inclusive
of 975,000 shares pursuant to the full exercise of the underwriters' option to
purchase additional shares. We received net proceeds of $136.6 million after
deducting underwriting discounts and commissions and other offering costs.

Since our inception, we have incurred significant operating losses. Our ability
to generate revenue sufficient to achieve profitability will depend on the
successful further development and commercialization of our products. We
generated revenue of $13.8 million and incurred net losses of $13.5 million for
the six months ended June 30, 2021. We generated revenue of $26.9 million and
incurred net losses of $12.8 million for the year ended December 31, 2020. As of
June 30, 2021, we had an accumulated deficit of $92.0 million. We expect to
continue to incur net losses as we focus on growing commercial sales of our
products in both the United States and international markets, including growing
our sales teams, scaling our manufacturing operations, continuing research and
development efforts to develop new products and further enhance our existing
products. Further, we expect to incur additional costs associated with operating
as a public company. As a result, we will need substantial additional funding
for expenses related to our operating activities, including selling, general and
administrative expenses and research and development expenses.

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Because of the numerous risks and uncertainties associated with product
development and commercialization, we are unable to accurately predict the
timing or amount of increased expenses or when, or if, we will be able to
achieve or maintain profitability. Until such time, if ever, as we can generate
substantial revenue sufficient to achieve profitability, we expect to finance
our operations through a combination of equity offerings, debt financings and
strategic alliances. We may be unable to raise additional funds or enter into
such other agreements or arrangements when needed on favorable terms, or at all.
If we are unable to raise capital or enter into such agreements as, and when,
needed, we may have to significantly delay, scale back or discontinue the
further development and commercialization efforts of one or more of our
products, or may be forced to reduce or terminate our operations.

We believe that our existing cash and cash equivalents, will enable us to fund
our operating expenses, capital expenditure requirements and debt service
payments into 2023. We have based this estimate on assumptions that may prove to
be wrong, and we could exhaust our available capital resources sooner than we
expect. See "Liquidity and Capital Resources."

COVID-19



In December 2019, a novel strain of coronavirus, or COVID-19, emerged in Wuhan,
Hubei Province, China. Less than four months later, in March 2020, the World
Health Organization declared COVID-19 a pandemic, and the virus has now spread
to many other countries and regions and every state within the United States,
including Massachusetts, where our primary offices and manufacturing facility
are located. The impact of this pandemic has been and will likely continue to be
extensive in many aspects of society, which has resulted in and will likely
continue to result in significant disruptions to the global economy, as well as
businesses and capital markets around the world.

In 2020, we had impacts to our business as a result of COVID-19 including
disruptions to our manufacturing operations and supply chain caused by facility
closures, reductions in operating hours, staggered shifts and other social
distancing efforts, decreased productivity and unavailability of materials or
components, limitations on our employees' and customers' ability to travel, and
delays in product installations, trainings or shipments to and from affected
countries and within the United States.

In 2021, we are seeing an increase in desktop customer activity in the lab and
customers enabling on site installations and trainings. However, we are
continuing to experience extended lead times on our supply chain and limitations
on travel, among other disruptions we experienced in 2020.

We do not yet know the net impact that the COVID-19 pandemic may have on our
business and cannot guarantee that it will not be materially negative. For
example, in the three months ended June 30, 2021, we recorded an increase to our
allowance for doubtful accounts of $1.7 million for a customer in the Middle
East where due to the credit and economic conditions, including the impact of
COVID-19, the Company determined that it is probable that collection will not
occur. Although we continue to monitor the situation and may adjust our current
policies as more information and public health guidance become available, the
ongoing effects of the COVID-19 pandemic and/or the precautionary measures that
we have adopted may create operational and other challenges, any of which could
harm our business and results of operations. While we maintain an inventory of
finished products and raw materials used in our products, a prolonged pandemic
could lead to shortages in the raw materials necessary to manufacture our
products. If we experience a prolonged disruption in our manufacturing, supply
chains or commercial operations, or if demand for our products or our customers'
ability to make payments is significantly reduced as a result of the COVID-19
pandemic, we would expect to experience a material adverse impact on our
business, financial condition, results of operations and prospects.

Historically, a significant portion of our field sales, customer training events
and other application services have been conducted in person, and the rollout of
our new products has historically been supported by our participation at
industry conferences. Currently, as a result of the work and travel restrictions
related to the COVID-19 pandemic, and the precautionary measures that we have
adopted, substantially all of our field sales and professional services
activities are being conducted remotely, which has resulted in a decrease in our
travel expenditures. However, we expect our travel expenditures to increase in
the future, which could negatively impact our financial condition and results of
operations. We do not yet know the extent of the negative impact of such
restrictions and precautionary measures on our ability to attract new customers
or retain and expand our relationships with existing customers over the near and
long term.

Factors Affecting Our Performance



We believe that our financial performance has been and in the foreseeable future
will continue to be primarily driven by the following factors. While each of
these factors presents significant opportunities for our business, they also
pose important challenges

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that we must successfully address in order to sustain our growth and improve our
results of operations. Our ability to successfully address the factors below is
subject to various risks and uncertainties.

Device sales



Our financial performance has largely been driven by, and in the future will
continue to be impacted by, the rate of sales of our handheld and desktop
devices. Management focuses on device sales as an indicator of current business
success and a leading indicator of likely future recurring revenue from
consumables and services. We expect our device sales to continue to grow as we
increase penetration in our existing markets and expand into, or offer new
features and solutions that appeal to, new markets.

We plan to grow our device sales in the coming years through multiple strategies
including expanding our sales efforts domestically and globally and continuing
to enhance the underlying technology and applications for life sciences research
related to our Rebel and ZipChip Interface. We regularly solicit feedback from
our customers and focus our research and development efforts on enhancing our
devices and enabling our customers to use additional applications that address
their needs, which we believe in turn helps to drive additional sales of our
devices and consumables.

Our sales process varies considerably depending upon the type of customer to
whom we are selling. Historically, our handheld devices have been used by state,
federal and foreign governments and governmental agencies. Our sales process
with government customers is often long and involves multiple levels of
approvals, testing and, in some cases, trials. Device orders from a government
customer are typically large orders and can be impacted by the timing of their
capital budgets. As a result, the revenue for our handheld devices can vary
significantly from period-to-period and has been and may continue to be
concentrated in a small number of customers in any given period.

Our desktop devices are typically used by the pharmaceutical, biotechnology and
academia markets. Our sales cycles within these markets tend to vary based on
the size of the customer and the number of devices they purchase. Our shortest
sales cycles are typically for small laboratories and individual researchers
where, in some cases, we receive purchase orders from these customers within
three months. Our sales process with other institutions can be longer with most
customers submitting purchase orders within six to twelve months. Given the
variability of our sales cycle, we have in the past experienced, and likely will
in the future experience, fluctuations in our desktop device sales on a
period-to-period basis. Additionally, we have experienced and may continue to
experience the impact of laboratory shutdowns related to COVID-19 on device and
consumable sales to these markets.

Recurring revenue



We regularly assess trends relating to recurring revenue which includes
consumables and services based on our product offerings, our customer base and
our understanding of how our customers use our products. Consumables and service
revenue was 22% and 5% of total product and service revenue for the three months
ended June 30, 2021 and 2020, respectively. Consumables and service revenue was
24% and 9% of total product and service revenue for the six months ended June
30, 2021 and 2020, respectively. Our recurring revenue as a percentage of total
product and service revenue will vary based upon new device placements in the
period. As our device installed base expands, recurring revenue on an absolute
basis is expected to increase and over time should be an increasingly important
contributor to our revenue.

Revenue from the sales of consumables will vary by type of device. We expect
that consumables and service revenue as a percentage of the original device
price to be higher for our desktop devices (Rebel and ZipChip Interface) than
for our handheld device (MX908). While we sell single-use swab samplers for
MX908 to be used in liquid and solid materials analysis, there are a number of
other applications that the MX908 can be used for that do not require
consumables. Rebel and ZipChip Interface require consumables kits for all areas
of operations. Currently, Rebel customers, who are actively utilizing the
device, are consuming on average one 200-sample kit per month; however, Rebel is
a new product and purchasing patterns related to our consumables kits are
evolving. We expect that the number of kits sold per month will vary over the
short term. In time, we expect Rebel consumables kits sales to become more
consistent as our installed base grows and our customers establish usage
patterns. At maximum potential capacity, with continuous operation, the Rebel
can consume approximately one 200-sample kit per day.

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Revenue mix and gross margin


Our revenue is derived from sales of our devices, consumables and services.
There will be fluctuations in mix between devices and consumables from
period-to-period. Over time, as our device installed base grows and we see
adoption of Rebel, we expect consumables revenue to constitute a
larger percentage of product and service revenue. However, the percentage will
be subject to fluctuation based upon our handheld sales in a period. In
addition, our selling price and, consequently, our margins, are higher for those
devices and consumables that we sell directly to customers as compared to those
that we sell through distributors. While we expect the mix of direct sales as
compared to sales through distributors to remain relatively constant in the near
term, we are currently evaluating increasing our direct sales capabilities in
certain geographies.

Future device and consumable selling prices and gross margins may fluctuate due
to a variety of factors, including the introduction by others of competing
products and solutions. We aim to mitigate downward pressure on our average
selling prices by increasing the value proposition offered by our devices and
consumables, primarily by expanding the applications for our devices and
increasing the quantity and quality of data that can be obtained using our
consumables.

Product adoption



We monitor our customers' stage of adoption of our products to provide insight
into the timing of future potential sales and to help us formulate financial
projections. Typical stages of adoption include testing, trials, pilot and
deployment as follows:

Testing-a customer is actively engaged with internal or external testing of our

? products. This may include an onsite or virtual demonstration with a

salesperson, a customer submitting samples for testing in one of our facilities

or testing by a third party.

Trials-a customer has committed to a trial of one of our products, which may

? include a defined period to assess functionality of the device in their

operational environment (in the field or onsite within the customer's

facility).

Pilot-a customer commits to the purchase of an initial quantity of devices to

? deploy in their operational environment to assess a broader opportunity that

may grow to tens or hundreds of devices.

Deployment-a customer has completed testing, a trial, and/or a pilot and

? intends to roll out the technology across their enterprise (either at a site or

throughout the entire organization).

Key Business Metrics


We regularly review the number of product placements and cumulative product
placements as key metrics to evaluate our business, measure our performance,
identify trends affecting our business, formulate financial projections, and
make strategic decisions. We believe that these metrics are representative of
our current business; however, we anticipate these will change or may be
substituted for additional or different metrics as our business grows.

During the three and six months ended June 30, 2021 and 2020, our product placements (units recognized as revenue) by device type were as follows:






                                                     Three Months Ended June 30,         Six Months Ended June 30,
                                                       2021                2020           2021               2020
Product Placements:
MX908                                                        84                 186            137                209
Rebel                                                        12                   8             21                 11
ZipChip Interface                                             7                   7             11                 14
Total placements                                            103                 201            169                234




The number of product placements vary considerably from period-to-period due to
the type and size of our customers and concentrations among larger government
customers as described above. We also have been impacted by laboratory shutdowns
related to COVID-19, especially with our ZipChip Interface device. We expect
continued fluctuations in our period-to-period number of product placements.

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Our cumulative product placements consist of the following number of devices:




                                      As of
                                  June 30, 2021
Cumulative Product Placements:
MX908                                     1,295
Rebel                                        67
ZipChip Interface                           168
Cumulative Product Placements             1,530




Components of Our Results of Operations

Revenue

Product and Service Revenue



We generate product and service revenue from the sale of our devices and
recurring revenue from the sale of consumables and services. Device sales
accounted for 78% and 95% of our product and service revenue for the three
months ended June 30, 2021 and 2020, respectively. Consumables and service
revenue accounted for 22% and 5% of our product and service revenue for the
three months ended June 30, 2021 and 2020, respectively. Device sales accounted
for 76% and 91% of our product and service revenue for the six months ended June
30, 2021 and 2020, respectively. Consumables and service revenue accounted for
24% and 9% of our product and service revenue for the six months ended June 30,
2021 and 2020, respectively.

Our current device offerings include:

? Handheld devices-MX908; and

? Desktop devices-Rebel and ZipChip Interface.


We sell our devices directly to customers and through distributors. Each of our
device sales drives various streams of recurring revenue comprised of consumable
product sales and service revenue.

Our consumables consist of:

? MX908-accessories and swabs;

? Rebel-consumables kit with a microfluidic chip and standards; and

? ZipChip Interface-microfluidic chip, reagent and assay kits.




Rebel and ZipChip Interface consumables can only be used with our devices and
there are no alternative after-market options that can be used as a substitute.
Each chip is used for a defined number of samples (or runs). We recognize
revenue from the sale of consumables as the consumable products are shipped.

We also offer our customers extended warranty and service plans. Our extended
warranty and service plans are offered for periods beyond the standard one-year
warranty that all of our customers receive. These extended warranty and service
plans generally have fixed fees and terms ranging from one additional year to
four additional years. We recognize revenue from the sale of extended warranty
and service plans over the respective coverage period, which approximates the
service effort provided by us.

We expect consumables and service revenue to increase in future periods as our installed base grows and we are able to generate recurring sales.

Licenses and contract revenue



License and contract agreements are arrangements whereby we provide engineering
services for the development of our technology platform for specific programs or
new and expanding applications of our technologies for future commercial
endeavors. Our license and contract agreements are with the U.S. government and
commercial entities (who may be contracting with the government). Contracts
typically include compensation for labor effort and materials incurred related
to the deliverables under the contract. Our license and contract revenue was
primarily related to one customer during the three and six months ended June 30,
2021 and 2020.

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During the three and six months ended June 30, 2021 and 2020, our revenue was comprised of revenue from the following sources:






                                                      Three Months Ended June 30,           Six Months Ended June 30,
                                                       2021                2020              2021               2020

                                                                               (in thousands)
Product and service revenue:
Device sales revenue                               $       6,181      $         9,894    $      10,092      $      11,882
Consumables and service revenue                            1,734                  484            3,180              1,135
Total product and service revenue                          7,915           

   10,378           13,272             13,017
License and contract revenue                                 362                  750              548              2,112
Total revenue                                      $       8,277      $        11,128    $      13,820      $      15,129




Our product and service revenue is comprised of sales of our handheld and
desktop devices and related consumables and service contracts to end-users in
the government, pharmaceuticals/biotechnology and academia markets as follows:




                                                      Three Months Ended June 30,           Six Months Ended June 30,
                                                       2021                2020              2021               2020

                                                                               (in thousands)
Product and Service Revenue by Device:
Handheld                                           $       5,278      $         8,827    $       8,518      $      10,367
Desktop                                                    2,637                1,551            4,754              2,650
Total product and service revenue                  $       7,915      $    

   10,378    $      13,272      $      13,017





                                                            Three Months Ended June 30,           Six Months Ended June 30,
                                                             2021                2020              2021               2020

                                                                                     (in thousands)
Product and Service Revenue by Market:
Government                                               $       5,279

$ 8,968 $ 8,513 $ 10,413 Pharmaceutical/Biotechnology

                                     2,609                1,169            4,709              2,352
Academia                                                            27                  241               50                252
Total product and service revenue                        $       7,915
$        10,378    $      13,272      $      13,017




We sell our products primarily in the United States; however, we are expanding
our global sales efforts as we see traction in our products and assess market
needs. The majority of our international sales are through a distribution
channel.

Cost of Revenue, Gross Profit and Gross Margin

Product cost of revenue primarily consists of costs for raw material parts and associated freight, shipping and handling costs, royalties, contract manufacturer costs, salaries and other personnel costs, overhead and other direct costs related to those sales recognized as product revenue in the period.



Cost of revenue for services primarily consists of salaries and other personnel
costs, travel related to services provided, facility costs associated with
training, warranties and other costs of servicing equipment on a
return-to-factory basis and at customer sites. License and contract cost of
revenue primarily consists of salaries and other personnel costs, materials,
travel and other direct costs related to the revenue recognized in the period.
The license and contract cost of revenue will vary based upon the type of
contract, including whether it is primarily for development services or for both
materials and development services.

We expect that our cost of revenue will increase or decrease to the extent that
our revenue increases and decreases and depending on how many contracts we have
ongoing at any given point in time and the stage of those contracts.

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Gross profit is calculated as revenue less cost of revenue. Gross profit margin
is gross profit expressed as a percentage of revenue. Our gross profit in future
periods will depend on a variety of factors, including: market conditions that
may impact our pricing, sales mix among devices, sales mix changes among
consumables, excess and obsolete inventories, our cost structure for
manufacturing operations relative to volume, and product warranty obligations.
Our gross profit in future periods will vary based upon our channel mix and may
decrease based upon our distribution channels and the potential to establish
original equipment manufacturing channels for certain components of our
technology platform which would have a lower gross margin.

We expect that our gross profit margin for product and service will increase
over the long term as our sales and production volumes increase and our cost per
unit decreases due to efficiencies of scale. We intend to use our design,
engineering and manufacturing capabilities to further advance and improve the
efficiency of our manufacturing, which we believe will reduce costs and increase
our gross margin. We expect that our gross profit margin for license and
contract will remain consistent for our contracts that are cost reimbursement
contracts.

Operating Expenses

Research and development expenses



Research and development expenses consist primarily of costs incurred for our
research activities, product development, hardware and software engineering and
consultant services and other costs associated with our technology platform and
products, which include:

employee-related expenses, including salaries, related benefits and stock-based

? compensation expense for employees engaged in research and hardware and

software development functions;

? the cost of maintaining and improving our product designs, including third

party development costs for new products and materials for prototypes;

? research materials and supplies; and

? facilities, depreciation and other expenses, which include direct and allocated

expenses for rent and maintenance of facilities and insurance.

We believe that our continued investment in research and development is essential to our long-term competitive position and expect these expenses to increase in future periods.

Selling, general and administrative expenses


Selling, general and administrative expenses consist primarily of salaries and
other personnel costs, and stock-based compensation for our sales and marketing,
finance, legal, human resources and general management, as well as professional
services, such as legal, audit and accounting services. We expect selling,
general and administrative expenses to increase in future periods as the number
of sales, sales application specialists and marketing and administrative
personnel grows and we continue to introduce new products, invest in
demonstration equipment, broaden our customer base and grow our business. We
also anticipate that we will incur increased accounting, audit, legal,
regulatory, compliance and director and officer insurance costs as well as
investor and public relations expenses associated with operating as a public
company.

Other Income (Expense)

Interest expense

Interest expense consists of interest expense associated with outstanding borrowings under our loan and security agreements and the amortization of deferred financing costs and debt discounts associated with such arrangements.



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Other income (expense), net

Other income (expense), net consists primarily of the change in fair value of
our redeemable convertible preferred stock warrants. We classified warrants for
the purchase of shares of our redeemable convertible preferred stock as a
liability on our condensed consolidated balance sheets as these warrants were
freestanding financial instruments that may have required us to transfer assets
upon exercise. The warrant liability was initially recorded at fair value upon
the date of issuance of each warrant and was subsequently remeasured to fair
value at each reporting date. Changes in the fair value of the warrant liability
were recognized as a component of other income (expense), net in the
consolidated statements of operations and comprehensive income (loss). On
December 22, 2020, immediately prior to the closing of our IPO, the warrants to
purchase preferred stock were converted into warrants to purchase common stock,
and the fair value of the warrant liability at that time was reclassified to
additional paid-in capital. As a result, subsequent to the closing of our IPO,
we no longer remeasure the fair value of the warrant liability at each reporting
date.

Other income (expense), net also consists of miscellaneous other income and expense unrelated to our core operations.

Provision for Income Taxes


We have not recorded any U.S. federal or state income tax benefits for the net
operating losses we have incurred in each year or for the research and
development tax credits we generated in the United States, as we believe, based
upon the weight of available evidence, that it is more likely than not that all
of our net operating loss carryforwards and tax credits will not be realized. As
of December 31, 2020, we had U.S. federal and state net operating loss
carryforwards of $59.2 million and $35.9 million, respectively, which may be
available to offset future taxable income and begin to expire in 2032 and 2025,
respectively, of which $24.8 million of federal net operating losses do not
expire. As of December 31, 2020, we also had U.S. federal and state research and
development tax credit carryforwards of $4.1 million and $2.3 million,
respectively, which may be available to offset future tax liabilities and begin
to expire in 2032 and 2029, respectively. We have recorded a full valuation
allowance against our net deferred tax assets at each balance sheet date.

Results of Operations

Comparison of the Three Months Ended June 30, 2021 and 2020

The following table summarizes our results of operations for the three months ended June 30, 2021 and 2020:






                                           Three Months Ended June 30,
                                             2021                2020          Change

                                                        (in thousands)
Revenue:

Product and service revenue             $         7,915      $      10,378    $ (2,463)
License and contract revenue                        362                750 

(388)


Total revenue                                     8,277             11,128 

(2,851)


Cost of revenue:
Product and service cost of revenue               3,846              4,471 

(625)


License and contract cost of revenue                 52                247 

      (195)
Total cost of revenue                             3,898              4,718        (820)
Gross profit                                      4,379              6,410      (2,031)
Operating expenses:
Research and development                          3,055              1,846        1,209

Selling, general and administrative               8,779              2,436 

6,343


Total operating expenses                         11,834              4,282 

7,552


Income (loss) from operations                   (7,455)              2,128 

    (9,583)
Other income (expense):
Interest expense                                   (39)              (246)          207
Other income (expense), net                          70                213        (143)

Total other income (expense), net                    31               (33) 

         64
Net income (loss)                       $       (7,424)      $       2,095    $ (9,519)




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Revenue, Cost of Revenue and Gross Profit

Product and service

Our product and service revenue is comprised of revenue from sales of devices and related consumables and service as follows:






                                               Three Months Ended June 30,             Change
                                                 2021               2020          Amount        %

                                                             (dollars in thousands)
Product and service revenue                  $      7,915      $       10,378    $ (2,463)      (24) %
Product and service cost of revenue                 3,846               4,471        (625)      (14) %
Gross profit                                 $      4,069      $        5,907    $ (1,838)      (31) %
Gross profit margin                                    51 %                57 %        (6) %





                                               Three Months Ended June 30,             Change
                                                 2021               2020          Amount        %

                                                             (dollars in thousands)
Device sales revenue                         $      6,181      $        9,894    $ (3,713)      (38) %
Consumables and service revenue                     1,734                 484        1,250       258 %
Total product and service revenue            $      7,915      $       10,378    $ (2,463)      (24) %




Product and service revenue decreased by $2.5 million, or 24%, for the three
months ended June 30, 2021, compared to the three months ended June 30, 2020.
Device sales accounted for 78% and 95% of our product and service revenue for
the three months ended June 30, 2021 and 2020, respectively. Consumables and
service revenue accounted for 22% and 5% of our product and service revenue for
the three months ended June 30, 2021 and 2020, respectively. The decrease in
device sales of $3.7 million was primarily due to a decrease of $4.3 million in
handheld device sales driven by 150 MX908's delivered to a government customer
in June 2020, partially offset by a $0.6 million increase in device sales in the
three months ended June 30, 2021 related to our desktop products. Consumables
and service revenue increased by $1.3 million primarily due to an increase in
consumable revenue of $0.8 million related to Rebel kit sales and initial sales
of the Aero module, a new accessory for our handheld, and to an increase in
service revenue of $0.5 million.

Product and service cost of revenue decreased by $0.6 million, or 14%, for the
three months ended June 30, 2021, compared to the three months ended June 30,
2020. The decrease in product and service cost of revenue was primarily related
to a $1.1 million decrease in costs related to lower product and service
revenue, partially offset by a $0.5 million increase in personnel and facility
related costs as we build out the capacity within operations and service
resources.

Product and service gross profit decreased by $1.8 million, or 31%, and gross
profit margin decreased by 6 percentage points for the three months ended June
30, 2021 as compared to the three months ended June 30, 2020, primarily due to
reduced MX908 sales volume which leveraged our fixed costs related to our
manufacturing facility, and to a lesser extent our investments in 2021 in
operations and service personnel.

License and contract




                                                      Three Months Ended June 30,            Change
                                                       2021                 2020         Amount      %

                                                                  (dollars in thousands)

License and contract revenue                       $         362        $         750    $ (388)    (52) %
License and contract cost of revenue                          52           

      247      (195)    (79) %
Gross profit                                       $         310        $         503    $ (193)    (38) %
Gross profit margin                                           86 %                 67 %       19 %




License and contract revenue decreased by $0.4 million, or 52%, for the three
months ended June 30, 2021, compared to the three months ended June 30, 2020.
The decrease in license and contract revenue was primarily related to decreased
activities under our subcontract agreement with a commercial entity that holds a
U.S. government prime contract.

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License and contract cost of revenue decreased $0.2 million, or 79% for the three months ended June 30, 2021, compared to the three months ended June 30, 2020 due to the decrease in activities under the subcontract agreement.



License and contract gross profit decreased by $0.2 million, or 38%, and gross
profit margin increased by 19 percentage points for the three months ended June
30, 2021 as compared to the three months ended June 30, 2020, primarily due to
the mix in contract deliverables during the quarter ended June 30, 2021.

Operating Expenses

Research and development




                                       Three Months Ended June 30,          Change
                                         2021               2020         Amount     %

                                                  (dollars in thousands)

Research and development expenses $ 3,055 $ 1,846 $ 1,209 65 % Percentage of total revenue

                     37 %               17 %




Our research and development expenses were $3.1 million for the three months
ended June 30, 2021, an increase of $1.2 million from research and development
expenses of $1.8 million for the three months ended June 30, 2020. The increase
was due primarily to a $0.7 million increase in personnel costs due to increased
headcount, a $0.1 million increase in materials spend related to product
enhancement initiatives for our MX908 and Rebel and a $0.2 million increase
related to facility allocations due to the increase in headcount and additional
costs incurred related to workforce safety during the COVID-19 pandemic in the
quarter ended June 30, 2021.

Selling, general and administrative expenses






                                                      Three Months Ended June 30,           Change
                                                        2021               2020         Amount      %

                                                                  (dollars in thousands)

Selling, general and administrative expenses        $       8,779      $   

   2,436    $ 6,343     260 %
Percentage of total revenue                                   106 %               22 %




Our selling, general and administrative expenses were $8.8 million for the three
months ended June 30, 2021, an increase of $6.3 million from selling, general
and administrative expenses of $2.4 million for the three months ended June 30,
2020. The increase was due primarily to a $2.5 million increase in salaries and
related costs as a result of expanding our headcount, as well as an increase in
commissions and bonus expense, an increase in recruiting fees and an increase in
stock-based compensation. Additional increase of $1.7 million related to the
provision to increase our allowance for bad debts related to a customer in the
Middle East, where due to the credit and economic conditions, including the
impact of COVID-19, the Company has determined during the second quarter of 2021
that it is probable that collection will not occur. The remaining $2.1 million
increase during the three months ended June 30, 2021, related to a $0.5 million
increase in insurance, a $0.3 million increase in audit and legal fees, a $0.8
million increase in consulting and related fees, a $0.2 million increase in
travel expenses and a $0.2 million increase related to marketing activities.

Other Income (Expense)

Interest expense

Interest expense was less than $0.1 million for the three months ended June 30,
2021, a decrease of $0.2 million from interest expense of $0.2 million for the
three months ended June 30, 2020.

Change in Fair Value of Preferred Stock Warrant Liability



The change in the fair value of our preferred stock warrant liability in the
three months ended June 30, 2020 was due primarily to the changes in the fair
value of our preferred stock during that period.

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On December 22, 2020, immediately prior to the closing of our IPO, the warrants
to purchase preferred stock were converted into warrants to purchase common
stock, and the fair value of the warrant liability at that time was reclassified
to common stock. As a result, subsequent to the closing of our IPO, we no longer
remeasure the fair value of the warrant liability at each reporting date.

Other income (expense), net

Other income (expense), net included interest income of $0.1 million and less than $0.1 million for the three months ended June 30, 2021 and 2020, respectively.

Comparison of the Six Months Ended June 30, 2021 and 2020

The following table summarizes our results of operations for the six months ended June 30, 2021 and 2020:






                                          Six Months Ended June 30,
                                             2021             2020         Change

                                                      (in thousands)
Revenue:

Product and service revenue             $        13,272     $  13,017    $ 

255


License and contract revenue                        548         2,112      

(1,564)


Total revenue                                    13,820        15,129      

(1,309)


Cost of revenue:
Product and service cost of revenue               6,406         6,041      

365


License and contract cost of revenue                127           580      

  (453)
Total cost of revenue                             6,533         6,621          (88)
Gross profit                                      7,287         8,508       (1,221)
Operating expenses:
Research and development                          6,020         4,002         2,018

Selling, general and administrative              14,532         5,142      

  9,390
Total operating expenses                         20,552         9,144        11,408
Loss from operations                           (13,265)         (636)      (12,629)
Other income (expense):
Interest expense                                  (415)         (487)            72
Other income (expense), net                         161           252          (91)
Total other expense, net                          (254)         (235)          (19)
Net loss                                $      (13,519)     $   (871)    $ (12,648)

Revenue, Cost of Revenue and Gross Profit

Product and service

Our product and service revenue is comprised of revenue from sales of devices and related consumables and service as follows:






                                                     Six Months Ended June 30,             Change
                                                      2021               2020         Amount       %

                                                                 (dollars in thousands)
Product and service revenue                       $      13,272      $      13,017    $   255        2 %

Product and service cost of revenue                       6,406              6,041        365        6 %
Gross profit                                      $       6,866      $       6,976    $ (110)      (2) %
Gross profit margin                                          52 %               54 %      (2) %




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                                                     Six Months Ended June 30,              Change
                                                      2021               2020          Amount        %

                                                                  (dollars in thousands)
Device sales revenue                               $     10,092      $      11,882    $ (1,790)     (15) %
Consumables and service revenue                           3,180              1,135        2,045      180 %
Total product and service revenue                 $      13,272      $     

13,017    $     255        2 %




Product and service revenue increased by $0.3 million, or 2%, for the six months
ended June 30, 2021, compared to the six months ended June 30, 2020. Device
sales accounted for 76% and 91% of our product and service revenue for the six
months ended June 30, 2021 and 2020, respectively. Consumables and service
revenue accounted for 24% and 9% of our product and service revenue for the six
months ended June 30, 2021 and 2020, respectively. The decrease in device sales
of $1.8 million was primarily due to a decrease of $2.9 million in handheld
device sales, representing a 72 unit decrease, primarily driven by the 150
MX908's delivered to a government customer in June 2020. Partially offsetting
the decrease was a $1.1 million increase in device sales related to our desktop
products primarily due to a ten unit increase in Rebel sales in the six months
ended June 30, 2021, partially offset by a decrease in sales of our ZipChip
Interfaces. Consumables and service revenue increased by $2.0 million primarily
due to a $0.9 million increase in service revenue and a $0.7 million increase in
desktop consumables, mainly from Rebel kit sales.

Product and service cost of revenue increased by $0.4 million, or 6%, for the
six months ended June 30, 2021, compared to the six months ended June 30, 2020.
The increase in product and service cost of revenue was primarily related to a
$0.7 million increase in personnel and facility related costs as we build out
the capacity within operations and service resources, offset in part by lower
cost of revenue due to product volume.

Product and service gross profit decreased by $0.1 million, or 2%, and gross
profit margin decreased by 2 percentage points for the six months ended June 30,
2021 as compared to the six months ended June 30, 2020, primarily due to higher
personnel and facility related costs.

License and contract




                                                      Six Months Ended June 30,              Change
                                                     2021                2020           Amount        %

                                                                  (dollars in thousands)

License and contract revenue                      $       548       $         2,112    $ (1,564)     (74) %
License and contract cost of revenue                      127              

    580        (453)     (78) %
Gross profit                                      $       421       $         1,532    $ (1,111)     (73) %
Gross profit margin                                        77 %                  73 %          4 %




License and contract revenue decreased by $1.6 million, or 74%, for the six
months ended June 30, 2021, compared to the six months ended June 30, 2020. The
decrease in license and contract revenue was primarily related to decreased
activities under our subcontract agreement with a commercial entity that holds a
U.S. government prime contract.

License and contract cost of revenue decreased $0.5 million, or 78% for the six
months ended June 30, 2021, compared to the six months ended June 30, 2020 due
to the decrease in activities under the subcontract agreement.

License and contract gross profit decreased by $1.1 million, or 73%, and gross
profit margin increased by 4 percentage points for the six months ended June 30,
2021 as compared to the six months ended June 30, 2020, primarily due to the mix
in contract deliverables during the six months ended June 30, 2021.

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Operating Expenses

Research and development




                                       Six Months Ended June 30,           Change
                                         2021              2020        Amount     %

                                                 (dollars in thousands)

Research and development expenses $ 6,020 $ 4,002 $ 2,018 50 % Percentage of total revenue

                    44 %              26 %




Our research and development expenses were $6.0 million for the six months ended
June 30, 2021, an increase of $2.0 million from research and development
expenses of $4.0 million for the six months ended June 30, 2020. The increase
was due primarily to a $1.1 million increase in personnel costs due to increased
headcount, a $0.3 million increase in materials spend related to product
enhancement initiatives for our MX908 and Rebel and a $0.4 million increase
related to facility allocations due to the increase in headcount and additional
costs incurred related to workforce safety during the COVID-19 pandemic in the
six months ended June 30, 2021.

Selling, general and administrative expenses






                                                     Six Months Ended June 30,            Change
                                                      2021               2020        Amount       %

                                                                (dollars in thousands)

Selling, general and administrative expenses $ 14,532 $ 5,142 $ 9,390 183 % Percentage of total revenue

                                 105 %              34 %




Our selling, general and administrative expenses were $14.5 million for the six
months ended June 30, 2021, an increase of $9.4 million from selling, general
and administrative expenses of $5.1 million for the six months ended June 30,
2020. The increase was due primarily to a $4.3 million increase in salaries and
related costs as a result of expanding our headcount, as well as an increase in
commissions and bonus expense, an increase in recruiting fees and an increase in
stock-based compensation. Additional increase of $1.7 million related to the
provision to increase our allowance for bad debts related to a customer in the
Middle East, where due to the credit and economic conditions, including the
impact of COVID-19, the Company has determined during the second quarter of 2021
that it is probable that collection will not occur.The remaining $3.4 million
increase during the six months ended June 30, 2021, related to a $1.1 million
increase in insurance, a $1.1 million increase in consulting and related fees, a
$0.6 million increase in audit and legal fees, a $0.2 million increase in travel
expenses and a $0.2 million increase related to marketing activities.

Other Income (Expense)

Interest expense

Interest expense was $0.4 million for the six months ended June 30, 2021, a decrease of $0.1 million from interest expense of $0.5 million for the six months ended June 30, 2020. Interest expense for the six months ended June 30, 2021 included a loss on extinguishment of debt of $0.2 million.

Change in Fair Value of Preferred Stock Warrant Liability



The change in the fair value of our preferred stock warrant liability in the six
months ended June 30, 2020 was due primarily to the changes in the fair value of
our preferred stock during that period.

On December 22, 2020, immediately prior to the closing of our IPO, the warrants
to purchase preferred stock were converted into warrants to purchase common
stock, and the fair value of the warrant liability at that time was reclassified
to common stock. As a result, subsequent to the closing of our IPO, we no longer
remeasure the fair value of the warrant liability at each reporting date.

Other income (expense), net

Other income (expense), net included interest income of $0.3 million and $0.1 million for the six months ended June 30, 2021 and 2020, respectively.



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Liquidity and Capital Resources



Since our inception, we have incurred significant operating losses. To date, we
have funded our operations primarily with proceeds from sales of redeemable
preferred stock, borrowings under loan agreements and revenue from sales of our
products and services and license and contract revenue and, most recently, with
proceeds from our IPO. As of June 30, 2021, we had cash and cash equivalents of
$141.3 million. We believe that our existing cash and cash equivalents will
enable us to fund our operating expenses, capital expenditure requirements and
debt service payments into 2023.

We have based this estimate on assumptions that may prove to be wrong, and we
could utilize our available capital resources sooner than we expect. Our future
funding requirements will depend on many factors, including:

? market uptake of our products, including the Rebel, which we launched

commercially in the fourth quarter of 2019;

? the cost and timing of establishing additional sales, marketing and

distribution capabilities;

? the cost of our research and development activities and timely launch of new

features and products

? the success of our existing collaborations and our ability to enter into

additional collaborations in the future;

? the effect of competing technological and market developments; and

? the level of our selling, general and administrative expenses.




On March 11, 2021, we entered into an Amended and Restated Loan and Security
Agreement, or the 2021 Revolver, with Signature Bank, or the Lender, to replace
our 2019 Loan and Security Agreement, or the 2019 Loan. The 2021 Revolver
created a revolving line of credit totaling $25.0 million and eliminated the
existing term loan. Borrowings under the revolving line of credit bear interest
at an annual rate equal to the greater of (i) one-half percent (0.5%) above the
prime rate or (ii) 4.0% and mature on March 11, 2024. Borrowings are
collateralized by substantially all of our property, excluding intellectual
property, which is subject to a negative pledge. The 2021 Revolver subjects us
to various customary covenants, including requirements as to financial reporting
and financial covenants (including an unrestricted minimum cash level of $10.0
million), and restrictions on our ability to dispose of our business or
property, to change our line of business, to liquidate or dissolve, to enter
into any change in control transaction, to merge or consolidate with any other
entity or to acquire all or substantially all the capital stock or property of
another entity, to incur additional indebtedness, to incur liens on our
property, to pay any dividends or make other distributions on capital stock
other than dividends payable solely in capital stock, to redeem capital stock,
to enter into in-bound licensing agreements, to engage in transactions with
affiliates, and to encumber our intellectual property. Events of default under
the 2021 Revolver include failure to make payments when due, insolvency events,
failure to comply with covenants or material adverse events with respect to us.
Upon the occurrence of an event of default and until such event of default is no
longer continuing, the annual interest rate will be 5.0% above the otherwise
applicable rate.

The terms of the 2021 Revolver required that the existing term loan outstanding under the 2019 Loan be repaid with an advance under the line of credit. Accordingly, on March 11, 2021, we used $14.5 million of proceeds from the revolving line of credit to repay all amounts then due on the existing term loan. We also borrowed an additional $0.5 million from the 2021 Revolver in March 2021.


We may seek additional funding through private or public equity financings, debt
financings, collaborations, strategic alliances and marketing, distribution or
licensing arrangements. We cannot assure you that we will be able to obtain
additional funds on acceptable terms, or at all. If we raise additional funds by
issuing equity or equity-linked securities, our stockholders may experience
dilution. Future debt financing, if available, may involve covenants, in
addition to our existing covenants, restricting our operations or our ability to
incur additional debt or potentially limiting our ability to obtain new debt
financing or the refinance of our existing debt. Any debt or equity financing
that we raise may contain terms that are not favorable to us or our
stockholders. If we raise additional funds through collaboration and licensing
arrangements with third parties, it may be necessary to relinquish some rights
to our technologies or our products, or grant licenses on terms that are not
favorable to us. If we do not have or are not able to obtain sufficient funds,
we may have to delay development or commercialization of our products. We also
may have to reduce marketing, customer support or other resources devoted to our
products or cease operations.

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Cash Flows

The following table summarizes our sources and uses of cash for each of the
periods presented:




                                                                 Six Months Ended June 30,
                                                                    2021             2020

                                                                       (in thousands)
Cash used in operating activities                              $     (16,938)     $   (6,398)
Cash used in investing activities                                       (625)           (184)
Cash provided by (used in) financing activities                         (290)               4

Net decrease in cash, cash equivalents and restricted cash $ (17,853) $ (6,578)






Operating Activities

During the six months ended June 30, 2021, net cash used in operating activities
was $16.9 million, primarily resulting from our net loss of $13.5 million and
net cash used by changes in our operating assets and liabilities of $6.6
million, partially offset by noncash charges of $3.1 million. Net cash used by
changes in our operating assets and liabilities for the six months ended June
30, 2021 consisted primarily of an increase in inventory of $3.9 million, an
increase in prepaid expenses and other current and non-current assets of $3.3
million, and a $0.2 million increase in accounts receivable, partially offset by
an increase in deferred revenue of $0.5 million and an increase in accounts
payable and accrued expenses of $0.5 million.

During the six months ended June 30, 2020, operating activities used $6.4
million of cash, primarily resulting from our net loss of $0.9 million and net
cash used by changes in our operating assets and liabilities of $6.0 million,
partially offset by noncash charges of $0.5 million. Net cash used by changes in
our operating assets and liabilities for the six months ended June 30, 2020
consisted primarily of a $10.0 million increase in accounts receivable partially
offset by an increase in deferred revenue of $3.2 million, a decrease in
inventory of $0.8 million and an increase in accounts payable and accrued
expenses of $0.4 million.

Investing Activities

During the six months ended June 30, 2021, net cash used in investing activities was $0.6 million, due to purchases of property and equipment.

During the six months ended June 30, 2020, net cash used in investing activities was $0.2 million, due to purchases of property and equipment.

Financing Activities



Cash used in financing activities during the six months ended June 30, 2021, was
$0.3 million, consisting primarily of payments of offering costs related to our
IPO, partially offset by proceeds from issuance of common stock upon option
exercise. We also received net proceeds from borrowings under the 2021 Revolver
of $15.0 million. We used proceeds of $14.5 million from the revolving line of
credit to repay our previously outstanding borrowings under our loan and
security agreement. Prior to repayment of our loan and security agreement, we
had made principal payments of $0.5 million.

During the six months ended June 30, 2020, net cash provided by financing
activities was less than $0.1 million, consisting of proceeds from issuance of
common stock upon option exercise. We also received proceeds from a Paycheck
Protection Program loan of $2.2 million, which we then fully repaid in the

same
period.

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Critical Accounting Policies and Significant Judgments and Estimates


Our condensed consolidated financial statements are prepared in accordance with
generally accepted accounting principles in the United States, or GAAP. The
preparation of our condensed consolidated financial statements and related
disclosures requires us to make estimates and judgments that affect the reported
amounts of assets, liabilities, revenue, costs and expenses and the disclosure
of contingent assets and liabilities in our condensed consolidated financial
statements. We base our estimates on historical experience, known trends and
events and various other factors that we believe are reasonable under the
circumstances, the results of which form the basis for making judgments about
the carrying values of assets and liabilities that are not readily apparent from
other sources. We evaluate our estimates and assumptions on an ongoing basis.
Our actual results may differ from these estimates under different assumptions
or conditions.

There have been no material changes to our critical accounting policies and estimates from those disclosed in our consolidated financial statements and the related notes and other financial information included in our 2020 Form 10-K.

Off-Balance Sheet Arrangements


We did not have during the periods presented, and we do not currently have, any
off-balance sheet arrangements, as defined in the rules and regulations of the
Securities and Exchange Commission.

Recently Issued Accounting Pronouncements



A description of recently issued accounting pronouncements that may potentially
impact our financial position and results of operations is disclosed in Note 2
to our unaudited condensed consolidated financial statements included in this
Quarterly Report on Form 10-Q.

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