The following discussion and analysis of our financial condition and results of operations should be read together with our condensed consolidated financial statements and related notes and other financial information appearing elsewhere in this Quarterly Report on Form 10-Q. This discussion and analysis contains forward-looking statements that involve risks, uncertainties and assumptions. Our actual results could differ materially from these forward-looking statements as a result of many factors, including those discussed in "Risk factors" and "Special note regarding forward-looking statements."

Overview

We are a clinical-stage biopharmaceutical company focused on developing novel therapeutics to address unmet medical needs in viral and liver diseases. We utilize our proprietary oligonucleotide and small molecule platforms to develop pharmacologically optimized drug candidates for use in combination regimens designed to achieve improved treatment outcomes. Our lead effort is to develop a functional cure for Chronic Hepatitis B (CHB), which often results in life-threatening conditions such as cirrhosis, end-stage liver disease (ESLD) and the most common form of liver cancer, hepatocellular carcinoma (HCC). The most widely used treatment for CHB, nucleos(t)ide analogs, suppresses viral replication but only achieves low rates of functional cure and often requires long-term administration. To address this issue, we have developed a portfolio of differentiated drug candidates for CHB, including an S-antigen Transport-inhibiting Oligonucleotide Polymers (STOPS) molecule, a small molecule Capsid Assembly Modulator (CAM), and oligonucleotides (Antisense Oligonucleotides (ASO) and Small Interfering Ribonucleic Acids (siRNA)), each of which is designed against clinically validated targets in the Hepatitis B Virus (HBV) life cycle. We believe that combination regimens utilizing our portfolio of CHB drug candidates may lead to higher rates of functional cure. Initial Phase 1a studies in healthy volunteers for our STOPS molecule and CAM have been completed. Phase 1b dose range studies, evaluating the properties of our STOPS molecule and CAM as monotherapy in CHB patients, are approved in many countries, including New Zealand, Hong Kong, the United Kingdom, South Korea, China and Moldova, and dosing in patients in both of these studies is ongoing. The STOPS molecule drug candidate, ALG-010133, was generally well tolerated in healthy volunteers (HVs) when given as single and multiple (3 weekly) subcutaneous doses of up to 200 mg and 180 mg, respectively. No serious adverse events (SAEs) or treatment emergent adverse events (TEAEs) leading to premature discontinuation of study drug occurred. Injection site reactions (ISRs) occurred in 19% of ALG-010133-treated subjects and were generally characterized by localized erythema that was mild to moderate in severity and resolved over time. One ISR that occurred after receiving a single 200 mg dose of ALG-010133 was considered severe based on surface area criteria (>100 cm2). Prophylactic use of topical steroids is being utilized in Phase 1b to potentially mitigate future ISRs. Based on the pharmacokinetic (PK) exposures achieved in HVs, weekly subcutaneous doses of 120 mg and higher will be evaluated in CHB cohorts. Currently, doses of 120 mg and 200 mg given weekly over 12 weeks are being evaluated in two separate cohorts of patients with CHB. For the CAM drug candidate, ALG-000184, preliminary data in both HVs and CHB subjects indicate the drug has predictable PK and was well tolerated, with no SAEs or TEAEs leading to discontinuation reported. Additionally, antiviral activity data in eight treatment naive/currently not treated CHB subjects receiving a daily dose of 100 mg ALG-000184 for 14 days were promising, showing a mean HBV DNA reduction of 2.9 log10 IU/mL. In the future, we may also conduct clinical trials for our STOPS molecule and CAM and other drug candidates in other countries and territories. Additionally, we recently filed a clinical trial application (CTA) seeking regulatory approval to initiate a two-part Phase 1a/1b study evaluating the safety, pharmacokinetics, and antiviral activity of our ASO, ALG-020572, in HVs and CHB subjects, respectively. Finally, our preclinical efforts to advance our siRNA targeted against HBV are ongoing, with ALG-125755 CTA filing on-track for 1H 2022.

Our second area of focus is in non-alcoholic steatohepatitis (NASH), a complex, chronic liver disease where combination regimens may likewise prove beneficial. Our most advanced drug candidate for NASH is ALG-055009, a small molecule THR-ß agonist is currently in nonclinical studies to enable a first-in-human clinical trial. We plan to file a CTA for a Phase 1a/1b study in HVs and subjects with hyperlipidemia in Q3 2021. We believe ALG-055009 has the potential to become an integral component of future combination regimens for NASH.

Our third area of focus is to develop drug candidates with pan-coronavirus activity, including Severe Acute Respiratory Syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for COVID-19. Our efforts to identify a coronavirus therapeutic are multipronged and utilize both our small molecule and oligonucleotide expertise. For our small molecule approach, we are exploring coronavirus protease inhibitors in collaboration with KU Leuven / CISTIM / CD3. In the oligonucleotide areas, we are investigating a siRNA modality and are exploring the potential for targeted lung delivery with this approach.

In October 2020, we completed our initial public offering (IPO) and issued 10,000,000 shares of our common stock at a price to the public of $15.00 per share for net proceeds of $135.4 million, after deducting underwriting discounts and commissions of $10.5 million and expenses of $4.1 million. In connection with the IPO, all shares of Series A, Series B-1 and Series B-2 redeemable convertible preferred stock converted into 19,761,870 shares of voting common stock and 3,092,338 shares of non-voting common stock. On November 5, 2020, the underwriters of the IPO partially exercised their overallotment option by purchasing an additional 1,150,000 shares from the Company, resulting in an additional $16.0 million, after deducting underwriting discounts and commissions



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of $1.2 million. Prior to our IPO, we had received gross proceeds of approximately $186.9 million from sales of our preferred stock and our issuance of convertible debt.

In July 2021, we completed a follow-on offering and issued 4,400,000 shares of our common stock at a price to the public of $19.00 per share for net proceeds of $77.9 million, after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

We have incurred net losses and negative cash flows from operations in each year since our formation in February 2018. Our net losses were $57.5 million and $40.8 million for the six months ended June 30, 2021 and 2020, respectively. We have had no revenue from product sales. As of June 30, 2021, we had an accumulated deficit of $232.2 million. Substantially all of our net losses have resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with our operations. We expect to continue to incur significant expenses and increasing operating losses over at least the next several years. Our net operating losses may fluctuate from quarter to quarter and year to year depending primarily on the timing of our clinical trials and nonclinical studies and our other research and development expenses. We have no internal manufacturing capabilities or salesforce and outsource a substantial portion of our clinical trial work to third parties.

Components of our results of operations

Operating expenses

Our operating expenses since inception have consisted solely of research and development costs and general and administrative costs.

Research and development expenses

We rely substantially on third parties to conduct our discovery activities, nonclinical studies, clinical trials and manufacturing. We estimate research and development expenses based on estimates of services performed, and rely on third party contractors and vendors to provide us with timely and accurate estimates of expenses of services performed to assist us in these estimates. A portion of our research and development expenses are based on contractual milestones. Research and development costs consist primarily of costs incurred for the identification and development of our drug candidates through our technology platforms, which include:



   •  salaries, benefits and other employee-related costs, including stock-based
      compensation expense, for personnel engaged in research and development
      functions;


   •  costs of outside consultants, including their fees, and related travel
      expenses;


   •  costs associated with in-process research and development, including license
      fees and milestones paid to third-party collaborators for technologies with
      no alternative use;


   •  costs related to production of clinical materials, including fees paid to
      contract manufacturers;


   •  expenses incurred under agreements with collaborators that perform
      nonclinical activities;


  • costs related to compliance with regulatory requirements; and


   •  facility costs, depreciation, and other expenses, which include direct and
      allocated expenses for rent and maintenance of facilities, insurance, and
      other supplies.

We expense research and development costs as the services are performed or the goods are received. Non-refundable payments for goods or services that will be used for future research and development activities are deferred and capitalized. Such amounts are recognized as an expense as the goods are delivered or the related services are performed until it is no longer expected that the goods will be delivered or the services will be rendered.

We expect our research and development costs to increase in future periods as we continue to invest in research and development activities and advance our nonclinical and clinical programs through clinical development. The process of conducting nonclinical studies and, eventually, clinical trials necessary to obtain regulatory approval is costly and time consuming, and the successful development of our drug candidates is highly uncertain. As a result, we are unable to determine the duration and completion costs of our research and development projects or clinical trials or if and to what extent we will generate revenue from the commercialization and sale of any of our drug candidates.



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General and administrative expenses

General and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation, for personnel in our executive, finance, corporate and business development and administrative functions. General and administrative expenses also include legal fees relating to patent and corporate matters; professional fees for accounting, auditing, tax and consulting services; insurance costs; travel expenses; and facility-related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other operating costs not otherwise classified as research and development costs.

We expect that our general and administrative expenses will increase in the future as we increase our general and administrative personnel headcount to support personnel in research and development and to support our operations generally as we increase our research and development activities and activities related to the potential commercialization of our drug candidates. We also expect to incur increased expenses associated with operating as a public company, including costs of accounting, audit, legal, regulatory and tax-related services associated with maintaining compliance with exchange listing rules and requirements of the Securities and Exchange Commission (the SEC), director and officer insurance costs, and investor and public relations costs.

Interest and other income (expense), net

Interest and other income (expense), net comprises interest income, net and other income (loss), net. Interest income, net primarily consists of interest earned on our cash, cash equivalents, and short-term investments and interest expense related to our convertible note instruments. Other (loss) income, net consists primarily of the change fair value of derivative liabilities and our short-term investments.

Results of Operations

Comparison of the three months ended June 30, 2021 and 2020

Operating expenses



The following table summarizes our operating expenses for the three months ended
June 30, 2021 and 2020:



                               Three Months Ended
                                    June 30,                  Change
                                2021          2020         ($)        %
Operating expenses:
Research and development     $   24,554     $ 17,176     $ 7,378       43 %
General and administrative        6,556        4,095       2,461       60 %
Total operating expenses     $   31,110     $ 21,271     $ 9,839       46 %



Research and development expenses

Research and development expenses were $24.6 million for the three months ended June 30, 2021, compared to $17.2 million for the three months ended June 30, 2020, an increase of $7.4 million. The increase was primarily due to an increase of $2.2 million of additional employee-related costs, of which $1.8 million related to stock-based compensation. The increase also includes $3.8 million in third-party expenses for our preclinical programs and the continued increase in expenditures related to research and development activities associated with our STOPs molecule and CAM candidates as well as activities related to our NASH program, a $0.3 million increase in consulting services, a $0.2 million increase in depreciation, a $0.2 million in recruiting costs due to increased headcount, and $0.7 million of facilities and related expenses.

General and administrative expenses

General and administrative expenses were $6.6 million for the three months ended June 30, 2021, compared to $4.1 million for the three months ended June 30, 2020, an increase of $2.5 million. The increase was primarily due to an increase of $2.1 million additional employee-related costs, of which $1.3 million related to stock-based compensation, $1.2 million increase in third-party expenses primarily due to increased administrative costs, patent costs and D&O insurance to support our status as a public company, offset by a decrease of $0.6 million in facilities and related expenses and a decrease of $0.2 million in depreciation and other costs.



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Interest and other income (expense), net





`                                              Three Months Ended
                                                    June 30,                       Change
                                              2021             2020           ($)            %
Interest income, net                       $       72       $      374     $    (302 )         -81 %
Other (loss) income, net                         (298 )             41          (339 )        -818 %
Total interest and other income
(expense), net                             $     (225 )     $      415     $    (641 )        -154 %



Interest income, net decreased to $0.1 million for the three months ended June 30, 2021 from $0.4 million for the three months ended June 30, 2020, a decrease in $0.3 million, primarily due to the change in our portfolio of cash equivalents and short-term investments which results in lower interest yield.

Other (loss) income, net decreased to a loss of $0.3 million for the three months ended June 30, 2021 from income of $0.0 million for the three months ended June 30, 2020, a decrease of $0.3 million, primarily due to the fair value change recognized on the net increase in fair value of both our redeemable convertible preferred stock liability and warrant liabilities in the prior year.

Comparison of the six months ended June 30, 2021 and 2020

Operating expenses



The following table summarizes our operating expenses for the six months ended
June 30, 2021 and 2020:



                               Six Months Ended
                                   June 30,                 Change
                               2021         2020         ($)         %
Operating expenses:
Research and development     $ 47,422     $ 34,478     $ 12,944       38 %
General and administrative     12,337        7,514        4,823       64 %
Total operating expenses     $ 59,759     $ 41,992     $ 17,767       42 %



Research and development expenses

Research and development expenses were $47.4 million for the six months ended June 30, 2021, compared to $34.5 million for the six months ended June 30, 2020, an increase of $12.9 million. The increase was primarily due to an increase of $4.9 million of additional employee-related costs, of which $3.3 million related to stock-based compensation. The increase also includes $5.6 million in third-party expenses for our preclinical programs and the continued increase in expenditures related to research and development activities associated with our STOPs molecule and CAM candidates, as well as activities related to our NASH program, a $0.4 million increase in depreciation, a $0.6 million increase in consulting and recruiting costs due to increased headcount, a $1.5 million increase of facilities and related expenses, partially offset by a $0.2 million decrease in lab expenses.

General and administrative expenses

General and administrative expenses were $12.3 million for the six months ended June 30, 2021, compared to $7.5 million for the six months ended June 30, 2020, an increase of $4.8 million. The increase was primarily due to an increase of $3.6 million of additional employee-related costs, of which $2.2 million related to stock-based compensation, $3.3 million increase in third-party expenses primarily due to increased administrative costs, patent costs and D&O insurance to support our status as a public company, offset by a decrease of $1.6 million in facilities and related expenses, a decrease of $0.3 million in consulting and recruitment costs, and a decrease of $0.2 million in depreciation and lab expenses.

Interest and other income (expense), net





`                                              Six Months Ended
                                                   June 30,                      Change
                                              2021           2020           ($)            %
Interest income, net                       $      178      $     842     $    (665 )         -79 %
Other (loss) income, net                         (292 )          266          (557 )        -210 %
Total interest and other income
(expense), net                             $     (114 )    $   1,108     $  (1,222 )        -110 %


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Interest income, net decreased to $0.2 million for the six months ended June 30, 2021 from $0.8 million for the six months ended June 30, 2020, a decrease in $0.6 million, primarily due to the change in our portfolio of cash equivalents and short-term investments which results in lower interest yield.

Other (loss) income, net decreased to a loss of $0.3 million for the six months ended June 30, 2021 from income of $0.3 million for the six months ended June 30, 2020, a decrease of $0.6 million, primarily due to the fair value change recognized on the net increase in fair value of both our redeemable convertible preferred stock liability and warrant liabilities in the prior year.

Liquidity and capital resources

Since our inception, we have not generated any revenue from product sales or any other sources, and have incurred significant operating losses. We have not yet commercialized any products and we do not expect to generate revenue from sales of any drug candidates for at least several years, if ever. To date, we have financed our operations through private placements of preferred stock, issuances of common stock and convertible debt. Through June 30, 2021, we had received gross proceeds of $186.9 million from sales of our preferred stock, issuances of common stock and our issuance of convertible debt. As of June 30, 2021, we had cash, cash equivalents and short-term investments of $190.7 million.

Funding requirements

We have incurred net losses since inception. Our primary use of cash is to fund operating expenses, which consist primarily of research and development costs related to our drug candidates and our discovery programs, and to a lesser extent, general and administrative expenditures. We expect our expenses to increase substantially in connection with our ongoing clinical development activities related to our most advanced drug candidates, ALG-010133 and ALG-000184, which are still in the early stages of development, as well as our research and development of our other drug candidates within our CHB, NASH and coronavirus programs.

In addition, we are incurring additional costs associated with operating as a public company following our IPO in October 2020. We expect that our expenses will increase substantially to the extent we:



   •  conduct our current and future clinical trials, and additional nonclinical
      studies;


   •  initiate and continue research and nonclinical and clinical development of
      other drug candidates;


  • seek to identify additional drug candidates;


   •  pursue marketing approvals for any of our drug candidates that successfully
      complete clinical trials, if any;


   •  establish a sales, marketing and distribution infrastructure to
      commercialize any products for which we may obtain marketing approval;


   •  require the manufacture of larger quantities of our drug candidates for
      clinical development and potentially commercialization;


   •  obtain, maintain, expand, protect and enforce our intellectual property
      portfolio;


  • acquire or in-license other drug candidates and technologies;


   •  hire and retain additional clinical, quality control and scientific
      personnel;


   •  achieve milestones triggering payments by us under our current and potential
      future licensing and/or collaboration agreements;


   •  build out or expand existing facilities to support our ongoing development
      activity; and


   •  add operational, financial and management information systems and personnel,
      including personnel to support our drug development, any future
      commercialization efforts and our transition to becoming a public company.

As of June 30, 2021, we had cash, cash equivalents and short-term investments of $190.7 million. In October 2020, we issued an aggregate of 3,569,630 shares of our Series B-2 redeemable convertible preferred stock in the second tranche of our Series B



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convertible preferred stock financing for aggregate proceeds to us of $40.0 million. In addition, we have received net proceeds of $151.4 million from the sale of an aggregate of 11,150,000 shares of our common stock on October 20, 2020 and on November 5, 2020 as part of our IPO, and net proceeds of $77.9 million from the sale of 4,400,000 shares of our common stock on July 6, 2021 as part of our Follow-on Offering. We believe that our existing cash, cash equivalents and short-term investments will enable us to fund our planned operating expenses and capital expenditure requirements through at least the next twelve months. 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. Furthermore, we may elect to raise additional capital on an opportunistic basis to fund operations.

Because of the numerous risks and uncertainties associated with our research and development programs and because the extent to which we may enter into collaborations with third parties for development of our drug candidates is unknown, we are unable to estimate the timing and amounts of increased capital outlays and operating expenses associated with completing the research and development of our drug candidates. Our future capital requirements will depend on many factors, including:



   •  the scope, progress, results and costs of researching and developing our
      drug candidates and programs, and of conducting nonclinical studies and
      clinical trials;


   •  the timing of, and the costs involved in, obtaining marketing approvals for
      drug candidates we develop if clinical trials are successful;


   •  the cost of commercialization activities for our current drug candidates,
      and any future drug candidates we develop, whether alone or in
      collaboration, including marketing, sales and distribution costs if our
      current drug candidates or any future drug candidate we develop is approved
      for sale;


   •  the cost of manufacturing our current and future drug candidates for
      clinical trials in preparation for marketing approval and commercialization;


   •  our ability to establish and maintain strategic licenses or other
      arrangements and the financial terms of such agreements, including milestone
      payments to our licensors;


   •  the costs involved in preparing, filing, prosecuting, maintaining,
      expanding, defending and enforcing patent claims, including litigation costs
      and the outcome of such litigation;


   •  the timing, receipt and amount of sales of, or profit share or royalties on,
      our future products, if any;


   •  the emergence of competing therapies hepatological indications and viral
      diseases and other adverse market developments; and


  • any acquisitions or in-licensing of other programs or technologies.

Developing pharmaceutical products, including conducting nonclinical studies and clinical trials, is a time-consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval for any drug candidates or generate revenue from the sale of any drug candidate for which we may obtain marketing approval. In addition, our drug candidates, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of drugs that we do not expect to be commercially available for many years, if ever. Accordingly, we will need to obtain substantial additional funds to achieve our business objectives.

Adequate additional funds may not be available to us on acceptable terms, or at all. We do not currently have any committed external source of funds. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest may be diluted, and the terms of these securities may include liquidation or other preferences and anti-dilution protections that could adversely affect your rights as a common stockholder. Additional debt or preferred equity financing, if available, may involve agreements that include restrictive covenants that may limit our ability to take specific actions, such as incurring debt, making capital expenditures or declaring dividends, which could adversely constrain our ability to conduct our business, and may require the issuance of warrants, which could potentially dilute your ownership interest.

If we raise additional funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our technology, future revenue streams, research programs, or drug candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings or collaborations, strategic alliances or licensing arrangements with third parties when needed, we may be required to delay, limit, reduce and/or terminate our product development programs or any future commercialization efforts or grant rights to develop and market drug candidates that we would otherwise prefer to develop and market ourselves.



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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
Net cash used in operating activities                         $ (52,814 )   $ (38,013 )
Net cash (used in) provided by investing activities              19,541        (8,838 )
Net cash (used in) provided by financing activities                 173           (21 )

Net decrease in cash, cash equivalents, and restricted cash $ (33,100 ) $ (46,872 )






Operating activities

During the six months ended June 30, 2021, operating activities used $52.8 million of cash, primarily resulting from our net loss of $57.5 million and cash used in changes in our operating assets and liabilities of $3.4 million, partially offset by non-cash charges of $8.1 million. Net cash used in changes in our operating assets and liabilities of $3.4 million consisted of a decrease of $2.5 million in deferred revenue from collaborations, a decrease of $0.6 million in operating lease liabilities, a decrease of $0.1 million in other liabilities, and an increase of $0.3 in other assets. The decrease in deferred revenue from collaborations was a result of recognition of revenue from collaborations due to progress towards the completion of the project. The decrease in the operating lease liability was a result of payments made on outstanding lease obligations.

During the six months ended June 30, 2020, operating activities used $38.0 million of cash, primarily resulting from our net loss of $40.8 million, partially offset by cash provided by changes in our operating assets and liabilities of $0.8 million and non-cash charges of $2.0 million. Net cash provided by changes in our operating assets and liabilities of $0.8 million consisted of an increase of $2.0 million in accounts payable and accrued liabilities, partially offset by a decrease of $0.6 million in operating lease liability and an increase of $0.6 million in other current assets. The increase in accounts payable and accrued liabilities was largely due to an increase in external research and development costs. The decrease in the operating lease liability was a result of payments made on outstanding lease obligations. The increase in other assets was largely due to an increase in prepayments for services.

Investing activities

During the six months ended June 30, 2021, investing activities provided $19.5 million of cash, consisting primarily of $20.0 million of investment maturities, offset by $0.5 million of purchases of property and equipment.

During the six months ended June 30, 2020, investing activities used $8.8 million of cash, consisting primarily of $45.3 million of short-term and long-term investment purchases and $1.7 million of purchases of property and equipment, offset by $38.1 million of short-term investment maturities.

Financing activities

During the six months ended June 30, 2021, net cash provided by financing activities was $0.2 million, consisting primarily of $0.3 million proceeds from the exercise of stock options, partially offset by $0.1 million of payments of deferred offering costs.

During the six months ended June 30, 2020, net cash used in financing activities was $0.0 million, consisting primarily of a $0.4 million payment of Series B-1 convertible preferred stock issuance costs, partially offset by the proceeds from the exercise of warrants to purchase shares of Series A convertible preferred stock of $0.4 million and proceeds from the exercise of stock options of $0.1 million.

Contractual obligations and commitments

We have no material changes to our contractual obligations and commitments as of June 30, 2021 as disclosed in the contractual obligations and commitment section in our Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 23, 2021.

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 SEC.



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Indemnification agreements

We enter into standard indemnification arrangements in the ordinary course of business. Pursuant to these arrangements, we indemnify, hold harmless and agree to reimburse the indemnified parties for losses suffered or incurred by the indemnified party, in connection with any trade secret, copyright, patent or other intellectual property infringement claim by any third party with respect to its technology. The term of these indemnification agreements is generally perpetual any time after the execution of the agreement. The maximum potential amount of future payments we could be required to make under these arrangements is not determinable. We have never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, we believe the fair value of these agreements is minimal.

Critical accounting policies and use of estimates

Our management's discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). The preparation of these consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts and the disclosure of assets and liabilities at the date of the consolidated 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.

For a discussion of our critical accounting estimates, see "Management's discussion and analysis of financial condition and results of operations" in our annual report on Form 10-K for the year ended December 31, 2020, previously filed with the SEC, the notes to our audited financial statements appearing in the Form 10-K and the notes to the financial statements appearing elsewhere in this Quarterly Report on Form 10-Q. There have been no material changes to these critical accounting policies and estimates through June 30, 2021 from those discussed in our Form 10-K.

Recently issued and adopted accounting pronouncements

For a description of the expected impact of recently adopted accounting pronouncements, see Note 2. Summary of Significant Accounting Policies in the "Notes to Unaudited Condensed Consolidated Financial Statements" contained in Part I, Item 1 of this report.

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