You should read the following discussion and analysis of our financial condition
and results of operations in conjunction with our financial statements and
related notes included elsewhere in this Annual Report. In addition to
historical financial information, the following discussion contains
forward-looking statements that involve risks and uncertainties. You should
carefully read the sections entitled "Special Note Regarding Forward-Looking
Statements" and "Risk Factors" to gain an understanding of the important factors
that could cause our actual results to differ materially from those expressed or
implied in any forward-looking statements.

Overview



We are a clinical-stage biopharmaceutical company focused on developing
transformative medicines for the treatment of diseases of the retina and optic
nerve. Our novel proprietary technologies are designed to release drugs in
ocular tissue at a controlled rate for up to 12 months in order to improve
patient compliance, reduce healthcare burdens and, ultimately, deliver better
clinical outcomes. Our lead product candidate, GB-102, is an intravitreal
injection of a microparticle depot formulation of sunitinib, a potent inhibitor
of neovascular growth and permeability, which are leading causes of retinal
disease. We are developing GB-102 as a once-every-six months intravitreal
injection for the treatment of wet age-related macular degeneration, or wet AMD,
and diabetic macular edema, or DME. In our Phase 1/2a clinical trial, GB-102
administered as a single 1 mg dose was well-tolerated in wet AMD patients and
demonstrated durable clinical evidence of disease control of at least six months
in approximately 88% of patients in this cohort. GB-102 has completed the
treatment phase of a dose-ranging, controlled and masked safety and efficacy
Phase 2b clinical trial in patients with wet AMD. We expect to report topline
data from this trial in March of 2021. We are also using our proprietary
technologies to develop GB-103, a once-a-year formulation of GB-102, for the
treatment of diabetic retinopathy, or DR, as well as GB-401, an intravitreally
injectable depot formulation of a beta-adrenergic blocking agent prodrug with a
dosing regimen of once-every-six months or longer for the treatment of primary
open-angle glaucoma, or POAG. We believe that our product candidates could
significantly improve clinical outcomes versus the respective standards of care
for several ocular diseases.

We were incorporated in May 2011 and our operations to date have been financed
primarily by gross proceeds of approximately $134.0 million from the issuance of
convertible promissory notes and convertible preferred stock, and $92.0 million
in net proceeds from our initial public offering of our common stock, or IPO,
after deducting underwriters' discounts and commissions of $7.2 million and
offering costs of $4.2 million.

Since inception, we have had significant operating losses. Our primary use of
cash is to fund operating expenses, which consist primarily of research and
development expenditures and, to a lesser extent, general and administrative
expenditures. Our net loss was $27.5 million and $37.0 million for the years
ended December 31, 2020 and 2019, respectively. As of December 31, 2020, we had
an accumulated deficit of $133.4 million and cash, cash equivalents and
short-term investments of $95.0 million.

We expect to continue to incur net losses for the foreseeable future, and we
expect our research and development expenses, general and administrative
expenses, and capital expenditures to continue to increase. In particular, we
expect our expenses to increase as we continue our development of, and seek
regulatory approvals for, our product candidates, and begin to commercialize any
approved products, as well as hire additional personnel, develop commercial
infrastructure, pay fees to outside consultants, lawyers and accountants, and
incur increased costs associated with being a public company, such as expenses
related to services associated with maintaining compliance with Nasdaq listing
rules and SEC reporting requirements, insurance and investor relations. Our net
losses may fluctuate significantly from quarter-to-quarter and year-to-year,
depending upon the timing of our clinical trials and our expenditures on other
research and development activities. Cash used to fund operating expenses is
impacted by the timing of when we pay these expenses, as reflected in the change
in our accounts payable and accrued research and development and other current
liabilities.

Recent Developments

Initial Public Offering

On September 29, 2020, we completed our IPO. As a result of the IPO, we issued
and sold an aggregate of 6,468,750 shares of our common stock (inclusive of
843,750 shares issued and sold pursuant to the exercise of the underwriters'
option to purchase additional shares on October 22, 2020) at a price of $16.00
per share for net proceeds of $92.0 million, after deducting underwriting
discounts, commissions and offering expenses. Prior to the completion of the
IPO, all 117,809,883 shares of our redeemable convertible preferred stock then
outstanding were converted into 13,085,913 shares of common stock.

Business Effects of COVID-19



The current COVID-19 pandemic has presented a substantial public health and
economic challenge around the world and is affecting our employees, patients,
clinicians, communities and business operations, as well as the U.S. economy and
financial markets. To date, our financial condition and operations have not been
significantly impacted by the COVID-19 outbreak; however, the full extent to
which the COVID-19 pandemic will directly or indirectly impact our business,
results of operations, liquidity and financial

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condition will depend on future developments, which are highly uncertain and
cannot be accurately predicted, including new information that may emerge
concerning COVID-19, the actions taken to contain it or treat its impact and the
economic impact on local, regional, national and international markets.

To date, our contract research organizations, or CROs, contract manufacturing
organizations, or CMOs, and other vendors have been able to continue to provide
services and supply reagents, materials, and products and currently do not
anticipate any disruption in services or interruptions in supply. Our CMOs
continue to operate their manufacturing facilities at or near normal levels.
While we currently do not anticipate any interruptions in our manufacturing
process, it is possible that the COVID-19 pandemic and response efforts may have
an impact in the future on our third-party suppliers' and contract manufacturing
partners' ability to manufacture reagents, materials or products that we need to
use in our research and upcoming clinical trials. However, we are continuing to
assess the potential impact of the COVID-19 pandemic on our business and
operations, including our expenses, our clinical trials, and our ability to hire
and retain employees.

While we are currently continuing to monitor patients in our ALTISSIMO clinical
trial at sites across the United States, we expect that COVID-19 precautions may
directly or indirectly impact the timeline for some of our clinical trial
activities due to the inability of patients to come to their monitoring visits,
the closing of eye clinics, and/or diversion of resources that are necessary to
conduct our observational study to care for COVID-19 patients.

The COVID-19 pandemic has caused us to modify our business practices including,
but not limited to, curtailing or modifying employee travel, moving to partial
remote work, and cancelling physical participation in meetings, events and
conferences. We may take further actions as may be required by government
authorities or that we determine are in the best interests of our employees,
patients, clinicians, and business partners.

The majority of our office-based employees have been working from home since
March 2020, while ensuring essential staffing levels to support our operations
remain in place, including maintaining key personnel in our laboratories.

For additional information on the various risks posed by the COVID-19 pandemic, please read Item 1A. Risk Factors.

Components of Operating Results

Research and Development Expenses

Our research and development expenses include:



    •   personnel costs, which include salaries, benefits and stock-based
        compensation;

• expenses incurred under agreements with consultants and third-party

contract organizations that conduct research and development activities on


        our behalf;


  • costs related to sponsored research service agreements;

• costs related to production of preclinical and clinical materials,

including fees paid to contract manufacturers;

• laboratory and vendor expenses related to the execution of preclinical

studies and planned clinical trials;

• milestones and royalty expense from our Johns Hopkins University Exclusive


        License Agreement;


    •   laboratory supplies and materials used for internal research and
        development activities; and


  • facilities and equipment costs.


Most of our research and development expenses have been related to the
preclinical and clinical development of GB-102. We have not reported program
costs since inception because we have not historically tracked or recorded our
research and development expenses on a program-by-program basis. We use our
personnel and infrastructure resources across the breadth of our research and
development activities, which are directed toward identifying and developing
product candidates.

We expense all research and development costs in the periods in which they are
incurred. Costs for certain research and development activities are recognized
based on an evaluation of the progress to completion of specific tasks using
information and data provided to us by our vendors and third-party service
providers.

We expect our research and development expenditures to increase substantially
for the foreseeable future as we continue to invest in research and development
activities related to developing our product candidates, including investments
in manufacturing, as we

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advance our programs and conduct clinical trials. The process of conducting the necessary clinical research to obtain regulatory approval is costly and time-consuming, and the successful development of our product candidates is highly uncertain.



Because of the numerous risks and uncertainties associated with product
development, we cannot determine with certainty the duration and completion
costs of the current or future preclinical studies and clinical trials or if,
when, or to what extent we will generate revenues from the commercialization and
sale of our product candidates. We may never succeed in achieving regulatory
approval for our product candidates. The duration, costs and timing of
preclinical studies and clinical trials and development of our product
candidates will depend on a variety of factors, including:

• successful completion of preclinical studies and clinical trials to the

satisfaction of the U.S. Food and Drug Administration, or FDA, European

Medicines Agency, or EMA, or other regulatory authorities;

• that our product candidates are safe and effective for any of their

proposed indications;

• acceptance of our products, if and when approved, by patients, the medical


        community and third-party payors;


  • effectively competing with other therapies;


    •   maintaining a continued acceptable safety profile of our products
        following approval;

• obtaining and maintaining coverage and adequate reimbursement from

third-party payors;

• applying for and receiving marketing approvals from applicable regulatory

authorities for our product candidates;

• scaling up our manufacturing processes and capabilities to support

additional or larger clinical trials of our product candidates and

commercialization of any of our product candidates for which we obtain

marketing approval;

• developing, validating and maintaining a commercially viable manufacturing

process that is compliant with current good manufacturing practices;

• developing and expanding our sales, marketing and distribution

capabilities and launching commercial sales of our product candidates, if

and when approved, whether alone or in collaboration with others;

• minimizing and managing any delay or disruption to our ongoing or planned

clinical trials, and any adverse impacts to the U.S. and global market for

pharmaceutical products, including as a result of the current COVID-19


        pandemic;


    •   obtaining and maintaining patent and trade secret protection and
        regulatory exclusivity;


  • protecting our rights in our intellectual property portfolio; and

• the impact of the COVID-19 pandemic and the corresponding responses of

businesses and governments.




We may never succeed in achieving regulatory approval for any of our product
candidates. We may obtain unexpected results from our preclinical studies and
clinical trials. We may elect to discontinue, delay or modify clinical trials of
some product candidates or focus on others. A change in the outcome of any of
these factors could mean a significant change in the costs and timing associated
with the development of our current and future preclinical and clinical product
candidates. For example, if the FDA, or another regulatory authority, were to
require us to conduct clinical trials beyond those that we currently anticipate
will be required for the completion of clinical development, or if we experience
significant delays in the execution of or enrollment in any of our preclinical
studies or clinical trials, we could be required to expend significant
additional financial resources and time on the completion of preclinical and
clinical development.

General and Administrative Expenses



Our general and administrative expenses consist primarily of personnel costs,
costs related to maintenance and filing of intellectual property, and other
expenses for outside professional services, including legal, human resources,
audit, and accounting services. Personnel costs consist of salaries, benefits
and stock-based compensation expense. We expect our general and administrative
expenses to increase over the next several years to support our expanding
headcount and operations, increased costs of operating as a public company, the
development of a commercial infrastructure to support the potential
commercialization of our product candidates, and the use of outside service
providers such as insurers, consultants, lawyers, and accountants.

Interest Income



Our interest income principally reflects interest earned on our investments. Our
investments include U.S. government-backed money-market funds, corporate debt
securities, commercial paper and government agency bonds. We place cash in
excess of immediate requirements into a custodial account and invested in
accordance with our investment policy, primarily with a view to liquidity and
capital preservation.

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Preferred Stock Tranche Obligation



We provided investors in our Series C preferred stock the option to buy
additional shares upon our achievement of certain development milestones, or the
Preferred Stock Tranche Obligation. The fair value of the Preferred Stock
Tranche Obligation was remeasured and adjusted to fair value each reporting
period until its expiration using an option pricing valuation methodology. In
September 2020, our board of directors and the Series C investors amended the
Series C stock purchase agreement such that the option to purchase additional
shares of our Series C preferred stock would no longer be exercisable and would
expire upon the effectiveness of our IPO registration statement. As a result,
the Preferred Stock Tranche Obligation expired upon the effectiveness of our IPO
registration statement on September 24, 2020.

Results of Operations

Comparison of the Years Ended December 31, 2020 and 2019

The following sets forth our results of operations (dollars in thousands):





                                            Year Ended December 31,                    Change
                                             2020             2019            Amount                %
Operating expenses:
Research and development                 $     20,962      $    30,580     $     (9,618 )             (31 )%
General and administrative                      8,870            6,922            1,948                28 %
Total operating expenses                       29,832           37,502           (7,670 )             (20 )%
Loss from operations                          (29,832 )        (37,502 )          7,670                20 %
Interest income                                   143            393             (250 )               (64 )%
Change in fair value of preferred
stock tranche obligation                        2,158             72            2,086                  NM
Net loss                                 $    (27,531 )    $ (37,037 )   $      9,506                  26 %




NM = Not meaningful

Research and Development Expenses

Research and development expenses comprised (dollars in thousands):





                                              Year Ended December 31,                Change
                                               2020              2019         Amount           %

CRO, CMO, nonclinical and other services $ 10,406 $ 18,656

 $  (8,250 )         (44 )%
Personnel costs                                   6,485            5,854           631            11 %
Consulting                                        1,332              886           446            50 %
Materials and supplies                              723            2,793        (2,070 )         (74 )%
Facility costs, travel and other                  2,016            2,391          (375 )         (16 )%
Total research and development expenses    $     20,962       $   30,580     $  (9,618 )         (31 )%



As of December 31, 2020 and 2019, we had 24 and 25 employees, respectively, engaged in research and development activities in our Baltimore, Maryland and Redwood City, California facilities.



Our research and development activities consist primarily of costs associated
with the development of GB-102 for which we are conducting one U.S. Phase 2
clinical trial in patients with wet AMD, and one U.S. Phase 2 trial for DME,
which was completed in 2020. Research and development expenses were $21.0
million in 2020 compared to $30.6 million in 2019. The decrease was primarily
due to the completion in 2019 of manufacturing the clinical supplies required
for the commencement of our Phase 2b, or ALTISSIMO, trial for GB-102, and the
fact that we did not engage in any primary manufacturing activities in the year
ended December 31, 2020.

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General and Administrative Expenses



General and administrative expenses to support our business activities comprised
(dollars in thousands):



                                                Year Ended December 31,                 Change
                                                2020               2019          Amount           %
Personnel costs                             $      3,283       $      2,813     $     470            17 %
Professional services                              3,031              1,829         1,202            66 %
Patent filing and portfolio costs                  1,125              1,482          (357 )         (24 )%
Facility costs, travel and other expenses          1,431                798           633            79 %

General and administrative expenses $ 8,870 $ 6,922

$   1,948            28 %





As of December 31, 2020 and 2019, we had seven and four employees, respectively, engaged in general and administrative activities principally in our Redwood City, California facility.





General and administrative expenses were $8.9 million in 2020 compared to $6.9
million in 2019. The increase was primarily due to additional professional
services, related in part to preparation for our IPO, and the increased cost of
additional D&O insurance as a result of becoming a public company.

Interest Income

Interest income was $143,000 and $393,000 for the year ended December 31, 2020 and 2019, respectively, primarily reflecting a decline in invested capital.

Preferred Stock Tranche Obligation



The change in fair value of Preferred Stock Tranche Obligation for the year
ended December 31, 2020 relates to the fair value adjustments of $2.2 million
primarily due to the $2.1 million gain recognized upon the expiration of this
instrument in connection with our IPO. In September 2020, the Preferred Stock
Tranche Obligation expired upon the effectiveness of the IPO registration
statement on September 24, 2020, resulting in a corresponding elimination of the
associated liability.

Liquidity and Capital Resources

Overview



To date, we have incurred loss and negative cash flow from operations. As of
December 31, 2020, we had available cash, cash equivalents and short-term
investments of $95.0 million and an accumulated deficit of $133.4 million. Prior
to our IPO, our operations had been financed primarily by gross proceeds of
approximately $134.0 million from the sale of convertible promissory notes and
our convertible preferred stock. In connection with our IPO, we issued and sold
an aggregate of 6,468,750 shares of common stock (inclusive of 843,750 shares of
common stock issued and sold pursuant to the exercise of the underwriters'
option to purchase additional shares) at a price of $16.00 per share for net
proceeds of $92.0 million, after deducting underwriters' discounts and
commissions and offering costs.

Funding Requirements



Any product candidates we may develop may never achieve commercialization and we
anticipate that we will continue to incur losses for the foreseeable future. We
expect that our research and development expenses, general and administrative
expenses, and capital expenditures will continue to increase. As a result, until
such time, if ever, as we can generate substantial product revenue, we expect to
finance our cash needs through a combination of equity offerings, debt
financings or other capital sources, including potentially collaborations,
licenses and other similar arrangements. Our primary uses of capital are, and we
expect will continue to be, compensation and related expenses, third-party
clinical research, manufacturing and development services, costs relating to the
build-out of our headquarters, laboratories and manufacturing facility, license
payments or milestone obligations that may arise, laboratory and related
supplies, clinical costs, manufacturing costs, legal and other regulatory
expenses and general overhead costs.

Our current operating plan, which includes initiating two Phase 3 clinical
trials in the fourth quarter of 2021, raises substantial doubt that our existing
cash, cash equivalents and short-term investments will be sufficient for us to
fund our operating expenses and capital expenditure requirements for the next 12
months.


Based upon our current operating plan, we believe our existing cash, cash equivalents and short-term investments will enable us to fund our operating expenses and capital expenditure requirements into the first quarter of 2022. We base this estimate on assumptions


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that may prove to be wrong, and we could utilize our available capital resources
sooner than we currently expect. As noted in our audited financial statements,
there are conditions that raise substantial doubt about our ability to continue
as a going concern for a period of one year from the date of the issuance of our
financial statements. Our ability to continue as a going concern is dependent
upon our ability to successfully secure sources of financing and ultimately
achieve profitable operations. Our independent registered public accounting firm
included an explanatory paragraph in their audit report on the financial
statements as of and for the years ended December 31, 2020 and 2019 stating that
our recurring losses from operations and negative cash flows since inception and
our need to raise additional funding to finance our operations raise substantial
doubt about our ability to continue as a going concern.

We will continue to require additional financing to advance our current product
candidates through clinical development, to develop, acquire or in-license other
potential product candidates and to fund operations for the foreseeable future.
We will continue to seek funds through equity offerings, debt financings or
other capital sources, potentially including collaborations, licenses and other
similar arrangements. We may, however, be unable to raise additional funds or
enter into such other arrangements when needed on favorable terms or at all. If
we do raise additional capital through public or private equity offerings, the
ownership interest of our existing stockholders will be diluted, and the terms
of these securities may include liquidation or other preferences that adversely
affect our stockholders' rights. If we raise additional capital through debt
financing, we may be subject to covenants limiting or restricting our ability to
take specific actions, such as incurring additional debt, making capital
expenditures or declaring dividends. Any failure to raise capital as and when
needed could have a negative impact on our financial condition and on our
ability to pursue our business plans and strategies. If we are unable to raise
capital, we will need to delay, reduce or terminate planned activities to reduce
costs.

Because of the numerous risks and uncertainties associated with research, development and commercialization of pharmaceutical products, we are unable to estimate the exact amount of our operating capital requirements. Our future funding requirements will depend on many factors, including, but not limited to:

• the scope, progress, results and costs of researching, developing and

manufacturing our product candidates or any future product candidates, and

conducting preclinical studies and clinical trials;

• the timing of, and the costs involved in, obtaining regulatory approvals

or clearances for our product candidates or any future product candidates;

• the number and characteristics of any additional product candidates we

develop or acquire;

• the cost of manufacturing our product candidates or any future product

candidates and any products we successfully commercialize, including costs

associated with building-out our manufacturing capabilities;

• our ability to establish and maintain strategic collaborations, licensing

or other arrangements and the financial terms of any such agreements that


        we may enter into;


  • the expenses needed to attract and retain skilled personnel;


  • the costs associated with being a public company;

• the timing, receipt and amount of sales of any future approved or cleared

products, if any; and

• the impact of the COVID-19 pandemic and the corresponding responses of

businesses and governments.




Further, our operating plans may change, and we may need additional funds to
meet operational needs and capital requirements for clinical trials and other
research and development activities. We currently have no credit facility or
committed sources of capital. Because of the numerous risks and uncertainties
associated with the development and commercialization of our product candidates,
we are unable to estimate the amounts of increased capital and operating
expenditures associated with our current and anticipated product development
programs.

Cash Flows

The following table summarizes our cash flows for the periods indicated:





                                                     Year Ended December 31,
                                                       2020             2019
                                                          (in thousands)
       Net cash (used in) provided by:
       Operating activities                        $    (32,064 )     $ (31,215 )
       Investing activities                             (42,560 )       (20,620 )
       Financing activities                              92,172         

54,871

Net increase in cash and cash equivalents $ 17,548 $ 3,036




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Operating Activities

Cash used in operating activities of $32.1 million during the year ended December 31, 2020 was primarily attributable to our net loss of $27.5 million and an increase of $4.6 million in our working capital.



Cash used in operating activities of $31.2 million during the year ended
December 31, 2019 was attributable to our net loss of $37.0 million, partially
offset by a $4.9 million decrease in our working capital and non-cash charges of
$0.9 million principally with respect to stock-based compensation and
depreciation expense.

Investing Activities

Cash used in investing activities of $42.6 million during the year ended December 31, 2020 consisted of $61.6 million of purchases of short-term investments and $1.0 million of purchases of property and equipment, partially offset by $20.0 million provided upon maturity of short-term investments.

Cash used in investing activities of $20.6 million during the year ended December 31, 2019 consisted of $22.5 million of purchases of short-term investments and $0.6 million of purchases of property and equipment, partially offset by $2.5 million provided upon maturity of short-term investments.

Financing Activities



Cash provided by financing activities of $92.2 million for the year ended
December 31, 2020 consisted of $96.3 million of proceeds, net of the
underwriters' discounts and commissions, from the issuance of common stock in
connection with our IPO and $0.1 million received from the exercise of stock
options, partially offset by $4.2 million related to the payments of offering
costs.

Cash provided by financing activities of $54.9 million for the year ended
December 31, 2019 consisted of $54.8 million of net proceeds upon the issuance
of our Series C convertible preferred stock, and $0.1 million received from the
exercise of stock options.

Critical Accounting Policies and Significant Judgments and Estimates



Management's discussion and analysis of our financial condition and results of
operations is based on our financial statements, which have been prepared in
accordance with U.S. Generally Accepted Accounting Principles. The preparation
of these financial statements requires us to make estimates and assumptions that
affect the reported amounts of assets and liabilities and the disclosure of
contingent assets and liabilities at the date of the financial statements, as
well as the reported expenses incurred during the reporting periods. 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 and any
such differences may be material.

We believe that the accounting policies discussed below are critical to understanding our historical and future performance, as these policies relate to the more significant areas involving management's judgments and estimates.

Research and Development Expense and Accruals



We record research and development expenses to operations as incurred. Research
and development expenses represent costs incurred by us for the discovery and
development of our product candidates and the development of our technology and
include: employee-related expenses, including salaries, benefits, travel and
non-cash stock-based compensation expense; external research and development
expenses incurred under arrangements with third parties, such as CROs,
preclinical testing organizations, CMOs, academic and non-profit institutions
and consultants; license fees; and other expenses, which include direct and
allocated expenses for laboratory, facilities and other costs.

As part of the process of preparing financial statements, we are required to
estimate and accrue expenses. We estimate costs of research and development
activities conducted by service providers, which include the conduct of
sponsored research, preclinical studies and contract manufacturing activities.
Payments made prior to the receipt of goods or services to be used in research
and development are deferred and recognized as expense in the period in which
the related goods are received or services are rendered. If the costs have been
prepaid, this expense reduces the prepaid expenses on the balance sheet, and if
not yet invoiced, the costs are included in accrued liabilities on the balance
sheet. We classify such prepaid assets as current or non-current assets based on
our estimates of the timing of when the goods or services will be realized or
consumed. These costs are a significant component of our research and
development expenses.

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We estimate these costs based on factors such as estimates of the work completed
and budget provided and in accordance with agreements established with our
collaboration partners and third-party service providers. We estimate the amount
of work completed through discussions with internal personnel and external
service providers as to the progress or stage of completion of the services and
the agreed-upon fee to be paid for such services. We make significant judgments
and estimates in determining the accrued balance in each reporting period. As
actual costs become known, we adjust our accrued estimates. Although we do not
expect our estimates to be materially different from amounts actually incurred,
our understanding of the status and timing of services performed may vary from
our estimates and could result in us reporting amounts that are too high or too
low in any particular period. Our accrued expenses are dependent, in part, upon
the receipt of timely and accurate reporting from external CROs and other
third-party service providers. Amounts ultimately incurred in relation to
amounts accrued for these services at a reporting date may be substantially
higher or lower than our estimates.

Our expenses related to clinical trials are based on estimates of patient
enrollment and related expenses at clinical investigator sites as well as
estimates for the services provided and efforts expended pursuant to contracts
with multiple research institutions and contract research organizations that may
be used to conduct and manage clinical trials on our behalf. We generally accrue
expenses related to clinical trials based on contracted amounts applied to the
level of patient enrollment and activity. If timelines or contracts are modified
based upon changes in the clinical trial protocol or scope of work to be
performed, we modify our estimates of accrued expenses accordingly on a
prospective basis.

We have and may continue to enter into license agreements to access and utilize
certain technology. We evaluate if the license agreement is an acquisition of an
asset or a business. To date none of our license agreements have been considered
to be an acquisition of a business. For asset acquisitions, the upfront payments
to acquire such licenses, as well as any future milestone payments made before
product approval, will be immediately recognized as research and development
expense when due, provided there is no alternative future use of the rights in
other research and development projects. These license agreements may also
include contingent consideration in the form of cash. We assess whether such
contingent consideration meets the definition of a derivative.

Preferred Stock Tranche Obligation



Convertible preferred stock that includes features we have determined are not
clearly and closely related to the equity host are bifurcated and accounted for
separately as freestanding derivative assets or liabilities on the balance sheet
at their estimated fair value. We recognized a derivative liability as a result
of certain investors' having rights to purchase from us, on the same terms as
the Series C Preferred Stock Purchase Agreement executed in July 2019,
additional shares of our Series C preferred stock in subsequent tranches based
on the achievement of certain development milestones, or the Preferred Stock
Tranche Obligation. At initial recognition, we recorded the liability for the
Preferred Stock Tranche Obligation on the balance sheet at its estimated fair
value. This liability was subject to remeasurement at each balance sheet date
until the expiration of the Preferred Stock Tranche Obligation in September
2020, with changes in fair value recognized in our statements of operations.

The liability for the Preferred Stock Tranche Obligation was measured at fair
value using an option pricing valuation methodology that included inputs not
observable in the market and thus represents a Level 3 measurement. The option
pricing valuation methodology utilized requires inputs based on certain
subjective assumptions, including (a) expected stock price volatility, (b)
calculation of an expected term, (c) a risk-free interest rate and (d) expected
dividends. Significant judgment was used in determining these assumptions at
initial recognition and at each subsequent reporting period.

Stock-based Compensation



We recognize compensation costs related to stock-based awards to employees and
non-employees based on the estimated fair value of the awards on the date of
grant. We estimate the grant date fair value, and the resulting stock-based
compensation, using the Black-Scholes option-pricing model, or Black-Scholes.
The grant date fair value of the stock-based awards is generally recognized on a
straight-line basis over the requisite service period, which is generally the
vesting period of the respective awards.

Black-Scholes requires the use of subjective assumptions to determine the fair value of stock-based awards including:



    •   Fair Value of Common Stock- see subsection entitled "Common Stock
        Valuations" below.

• Expected Term-The expected term represents the period that stock-based

awards are expected to be outstanding. The expected term for option grants

is determined using the simplified method. The simplified method deems the


        expected term to be the midpoint between the vesting date and the
        contractual life of the stock-based awards.

• Expected Volatility-Since we were a privately held company until September

2020, and do not yet have sufficient trading history for our common stock,

the expected volatility is estimated based on the average volatility for

comparable publicly traded biotechnology companies over a period equal to

the expected term of the stock option grants. The comparable companies

were chosen based on their similar size, stage in the life cycle or area

of specialty. We will continue to apply this method until a sufficient

amount of historical information over a period equal to the expected term


        of the stock-based awards becomes available.


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• Risk-Free Interest Rate-The risk-free interest rate is based on the U.S.

Treasury zero coupon issues in effect at the time of grant for periods

corresponding with the expected term of the option.

• Expected Dividend-We have never paid dividends on our common stock and

have no plans to pay dividends on our common stock. Therefore, we used an

expected dividend yield of zero.




We will continue to use judgment in evaluating the assumptions utilized for our
stock-based compensation expense calculations on a prospective basis. In
addition to the assumptions used in Black-Scholes, the amount of stock-based
compensation expense we recognize in our financial statements includes stock
option forfeitures as they occur. Such assumptions involve inherent
uncertainties and the application of significant judgment. As a result, if
factors or expected outcomes change and we use significantly different
assumptions or estimates, our stock-based compensation could be materially
different.

Common Stock Valuations



Historically, for all periods prior to our IPO, the fair value of the shares of
common stock underlying our stock-based awards was estimated on each grant date
by our board of directors. In the absence of a public trading market for our
common stock, our board of directors exercised their judgment and considered a
number of objective and subjective factors to determine the best estimate of the
fair value of our common stock, including contemporaneous valuations, our stage
of development, important developments in our operations, the prices at which we
sold shares of our preferred stock, the rights, preferences and privileges of
our preferred stock relative to those of our common stock, actual operating
results and financial performance, the conditions in the biotechnology industry
and the economy in general, the stock price performance and volatility of
comparable public companies, and the lack of liquidity of our common stock,
among other factors.

In determining the fair value of our common stock, the methodologies used to
estimate our enterprise value were performed using methodologies, approaches and
assumptions consistent with the guidance outlined in the American Institute of
Certified Public Accountants Technical Practice Aid, Valuation of Privately Held
Company Equity Securities Issued as Compensation. The grant date fair value of
our common stock was determined using valuation methodologies incorporating a
number of assumptions including probability weighting of events, volatility,
time to liquidation, a risk-free interest rate and an assumption for a discount
for lack of marketability (Level 3 inputs). The methodology to determine the
fair value of our common stock included estimating the fair value of the
enterprise using a hybrid-method market approach, which estimates the fair value
of the company by including an estimation of the value of the business based on
scenarios in a probability-weighted expected return method, or PWERM, framework.
Under the hybrid-method market approach, the per share value calculated under
the scenarios are weighted based on expected exit outcomes and the quality of
the information specific to each allocation methodology to arrive at a final
estimated fair value per share value of the common stock before a discount for
lack of marketability is applied.

Following the closing of our IPO, our board of directors determines the fair
market value of our common stock based on its closing price as reported on The
Nasdaq Global Market on the date of grant.

Emerging Growth Company and Smaller Reporting Company Status



We are an emerging growth company, as defined in the Jumpstart Our Business
Startups Act of 2012, or 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 elected to use this extended transition period for complying
with new or revised accounting standards that have different effective dates for
public and private companies until the earlier of the date we (i) are no longer
an emerging growth company or (ii) affirmatively and irrevocably opt out of the
extended transition period provided in the JOBS Act. As a result, our financial
statements may not be comparable to companies that comply with new or revised
accounting pronouncements as of public company effective dates.

We are also a "smaller reporting company," meaning that the market value of our
stock held by non-affiliates is less than $700 million and our annual revenue is
less than $100 million during the most recently completed fiscal year. We may
continue to be a smaller reporting company if either (i) the market value of our
stock held by non-affiliates is less than $250 million or (ii) our annual
revenue is less than $100 million during the most recently completed fiscal year
and the market value of our stock held by non-affiliates is less than $700
million. If we are a smaller reporting company at the time we cease to be an
emerging growth company, we may continue to rely on exemptions from certain
disclosure requirements that are available to smaller reporting companies.
Specifically, as a smaller reporting company we may choose to present only the
two most recent fiscal years of audited financial statements in our Annual
Report on Form 10-K and, similar to emerging growth companies, smaller reporting
companies have reduced disclosure obligations regarding executive compensation.

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Recently Adopted Accounting Pronouncements



For a full discussion of recently adopted accounting pronouncements, see Note 2
to the financial statements included elsewhere in this Annual Report on Form
10-K for more information.

Contractual Obligations and Other Commitments

Contractual Obligations

Refer to Note 5 to our financial statements included within Item 8 of this Annual Report on Form 10-K for a description of our contractual obligations as of December 31, 2020.



We are party to license agreements pursuant to which we have in-licensed various
intellectual property rights. The license agreements obligate us to make certain
milestone payments related to achievement of specified events, as well as
royalties in the low-single digits based on sales of licensed products. None of
these events had occurred as of December 31, 2020, and no royalties were due
from the sales of licensed products.

We enter into contracts in the normal course of business with CROs for clinical
trials and CMOs for clinical supply manufacturing and with vendors for
equipment, preclinical research studies, research supplies and other services
and products for operating purposes. As of December 31, 2020, these commitments
were approximately $7.7 million due within 3 to 15 months. These contracts
generally provide for termination on notice of 60 to 90 days, and therefore we
believe that our non-cancelable obligations under these agreements are not
material.

Off-Balance Sheet Arrangements

During the periods presented, we did not have, nor do we currently have, any off-balance sheet arrangements as defined under SEC rules.

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