Cover Page
Cover Page - USD ($) $ in Millions | 12 Months Ended | ||
Dec. 31, 2022 | Mar. 10, 2023 | Jun. 30, 2022 | |
Cover [Abstract] | |||
Document Type | 10-K | ||
Document Annual Report | true | ||
Document Period End Date | Dec. 31, 2022 | ||
Current Fiscal Year End Date | --12-31 | ||
Document Transition Report | false | ||
Entity File Number | 001-39592 | ||
Entity Registrant Name | Kronos Bio, Inc. | ||
Entity Incorporation, State or Country Code | DE | ||
Entity Tax Identification Number | 82-1895605 | ||
Entity Address, Address Line One | 1300 So. El Camino Real | ||
Entity Address, Address Line Two | Suite 400 | ||
Entity Address, City or Town | San Mateo | ||
Entity Address, State or Province | CA | ||
Entity Address, Postal Zip Code | 94402 | ||
City Area Code | 650 | ||
Local Phone Number | 781-5200 | ||
Title of 12(b) Security | Common stock, $0.001 par value per share | ||
Trading Symbol | KRON | ||
Security Exchange Name | NASDAQ | ||
Entity Well-known Seasoned Issuer | No | ||
Entity Voluntary Filers | No | ||
Entity Current Reporting Status | Yes | ||
Entity Interactive Data Current | Yes | ||
Entity Filer Category | Non-accelerated Filer | ||
Entity Small Business | true | ||
Entity Emerging Growth Company | false | ||
ICFR Auditor Attestation Flag | false | ||
Entity Shell Company | false | ||
Entity Public Float | $ 204.6 | ||
Entity Common Stock, Shares Outstanding | 57,630,109 | ||
Entity Central Index Key | 0001741830 | ||
Document Fiscal Year Focus | 2022 | ||
Document Fiscal Period Focus | FY | ||
Amendment Flag | false | ||
Documents Incorporated by Reference | DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission (SEC) subsequent to the date hereof pursuant to Regulation 14A in connection with the registrant's 2023 Annual Meeting of Stockholders, are incorporated by reference into Part III of this Annual Report on Form 10-K. Such proxy statement will be filed with the SEC not later than May 1, 2023. |
Audit Information
Audit Information | 12 Months Ended |
Dec. 31, 2022 | |
Audit Information [Abstract] | |
Auditor Name | Ernst & Young LLP |
Auditor Location | San Mateo, California |
Auditor Firm ID | 42 |
Balance Sheets
Balance Sheets - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Current assets: | ||
Cash and cash equivalents | $ 75,973 | $ 198,270 |
Short-term investments | 162,212 | 141,239 |
Prepaid expenses and other current assets | 6,106 | 8,045 |
Total current assets | 244,291 | 347,554 |
Long-term investments | 9,762 | 0 |
Property and equipment, net | 12,985 | 14,880 |
Operating lease right-of-use assets | 24,707 | 26,904 |
Restricted cash | 2,026 | 2,026 |
Other noncurrent assets | 1,167 | 112 |
Total assets | 294,938 | 391,476 |
Current liabilities: | ||
Accounts payable | 5,047 | 998 |
Accrued expenses | 12,963 | 9,063 |
Current portion of operating lease liabilities | 2,347 | 2,109 |
Current portion of other liabilities | 1,129 | 1,456 |
Total current liabilities | 21,486 | 13,626 |
Noncurrent operating lease liabilities | 28,744 | 31,653 |
Other noncurrent liabilities | 209 | 1,100 |
Total liabilities | 50,439 | 46,379 |
Commitments and contingencies | ||
Stockholder's equity (deficit): | ||
Preferred stock, $0.001 par value; 10,000,000 authorized; no shares issued and outstanding | ||
Common stock, $0.001 par value, 200,000,000 shares authorized as of December 31, 2022 and 2021; 56,967,436 and 55,703,327 shares issued and outstanding as of December 31, 2022 and 2021, respectively. | 57 | 56 |
Additional paid-in capital | 641,422 | 608,064 |
Accumulated deficit | (396,188) | (262,984) |
Accumulated other comprehensive income (loss) | (792) | (39) |
Total stockholders' equity (deficit) | 244,499 | 345,097 |
Total liabilities and stockholders’ equity (deficit) | $ 294,938 | $ 391,476 |
Balance Sheets (Parenthetical)
Balance Sheets (Parenthetical) - $ / shares | Dec. 31, 2022 | Dec. 31, 2021 | Oct. 14, 2020 |
Statement of Financial Position [Abstract] | |||
Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 | $ 0.001 |
Preferred stock, shares authorized (in shares) | 10,000,000 | 10,000,000 | 10,000,000 |
Preferred stock, shares outstanding (in shares) | 0 | 0 | |
Preferred stock, shares issued (in shares) | 0 | 0 | |
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 | $ 0.001 |
Common stock, shares authorized (in shares) | 200,000,000 | 200,000,000 | |
Common stock, shares issued (in shares) | 56,967,436 | 55,703,327 | |
Common stock, shares outstanding (in shares) | 56,967,436 | 55,703,327 |
Statements of Operations and Co
Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Operating expenses: | ||
Research and development | $ 93,715 | $ 112,903 |
General and administrative | 43,400 | 38,495 |
Total operating expenses | 137,115 | 151,398 |
Loss from operations | (137,115) | (151,398) |
Other income (expense), net: | ||
Interest and other income, net | 3,911 | 320 |
Total other income (expense), net | 3,911 | 320 |
Net loss | (133,204) | (151,078) |
Other comprehensive income (loss): | ||
Net unrealized gain (loss) on available-for-sale securities | (753) | (20) |
Net comprehensive loss | $ (133,957) | $ (151,098) |
Net loss per share, basic (in dollars per share) | $ (2.37) | $ (2.76) |
Net loss per share, diluted (in dollars per share) | $ (2.37) | $ (2.76) |
Weighted-average shares of common stock, basic (in shares) | 56,201,398 | 54,753,599 |
Weighted-average shares of common stock, diluted (in shares) | 56,201,398 | 54,753,599 |
Statement of Stockholders_ Equi
Statement of Stockholders’ Equity (Deficit) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Accumulated Deficit |
Common stock, beginning balance (in shares) at Dec. 31, 2020 | 54,073,901 | ||||
Beginning balance at Dec. 31, 2020 | $ 465,519 | $ 54 | $ 577,390 | $ (19) | $ (111,906) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | |||||
Issuance of common stock upon vesting and exercise of options and vesting of restricted stock (in shares) | 1,533,703 | ||||
Issuance of common stock upon vesting and exercise of options and vesting of restricted stock | 3,127 | $ 2 | 3,125 | ||
Stock-based compensation expense | 26,211 | 26,211 | |||
Employee stock purchase plan (in shares) | 95,723 | ||||
Employee stock purchase plan | 1,338 | 1,338 | |||
Net unrealized gain (loss) on available-for-sale securities | (20) | (20) | |||
Net loss | (151,078) | (151,078) | |||
Common stock, ending balance (in shares) at Dec. 31, 2021 | 55,703,327 | ||||
Beginning balance at Dec. 31, 2021 | 345,097 | $ 56 | 608,064 | (39) | (262,984) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | |||||
Issuance of common stock upon vesting and exercise of options and vesting of restricted stock (in shares) | 1,003,344 | ||||
Issuance of common stock upon vesting and exercise of options and vesting of restricted stock | 1,834 | $ 1 | 1,833 | ||
Stock-based compensation expense | 31,145 | 31,145 | |||
Employee stock purchase plan (in shares) | 260,765 | ||||
Employee stock purchase plan | 380 | 380 | |||
Net unrealized gain (loss) on available-for-sale securities | (753) | (753) | |||
Net loss | (133,204) | (133,204) | |||
Common stock, ending balance (in shares) at Dec. 31, 2022 | 56,967,436 | ||||
Beginning balance at Dec. 31, 2022 | $ 244,499 | $ 57 | $ 641,422 | $ (792) | $ (396,188) |
Statements of Cash Flows
Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Cash flows from operating activities: | ||
Net loss | $ (133,204) | $ (151,078) |
Adjustments to reconcile net loss to cash used in operating activities: | ||
Depreciation and amortization | 2,266 | 1,977 |
Net amortization/accretion on available-for-sale securities | (533) | 3,997 |
Change in accrued interest on available-for-sale securities | 1,025 | 485 |
Stock-based compensation expense | 31,145 | 26,211 |
Noncash lease expense | 2,197 | 2,104 |
Changes in operating assets and liabilities: | ||
Prepaid expenses and other current assets | 1,605 | (975) |
Other long-term assets | (1,055) | 54 |
Accounts payable | 4,025 | (3,195) |
Accrued expenses | 4,130 | 4,786 |
Right-of-use operating assets and liabilities, net | (2,671) | 19 |
Other liabilities | 144 | (2,309) |
Net cash provided by (used in) operating activities | (90,926) | (117,924) |
Cash flows from investing activities: | ||
Purchase of property and equipment | (577) | (4,260) |
Purchase of marketable securities | (367,124) | (177,734) |
Maturities of marketable securities | 334,979 | 226,245 |
Sale of marketable securities | 500 | 19,473 |
Net cash provided by (used in) investing activities | (32,222) | 63,724 |
Cash flows from financing activities: | ||
Principal payments on finance lease | 0 | (5) |
Proceeds from issuance of common stock upon exercise of stock options | 471 | 3,127 |
Proceeds from issuance of common stock under the employee stock purchase plan | 380 | 1,338 |
Net cash provided by (used in) financing activities | 851 | 4,460 |
Net increase (decrease) in cash and cash equivalents | (122,297) | (49,740) |
Cash, cash equivalents and restricted cash at beginning of period | 200,296 | 250,036 |
Cash, cash equivalents and restricted cash at end of period | 77,999 | 200,296 |
Supplemental disclosures of non-cash activities: | ||
Property and equipment additions included in accounts payable and accrued expenses | 20 | 226 |
Reduction of right-of-use asset due to modification | 0 | (1,741) |
Right-of-use asset obtained in exchange for operating lease liability | 0 | 3,764 |
Cash and cash equivalents at end of period | 75,973 | 198,270 |
Restricted cash at end of period | 2,026 | 2,026 |
Cash, cash equivalents and restricted cash at end of period | $ 77,999 | $ 200,296 |
Nature of Operations and Basis
Nature of Operations and Basis of Presentation | 12 Months Ended |
Dec. 31, 2022 | |
Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
NATURE OF OPERATIONS AND BASIS OF PRESENTATION | NATURE OF OPERATIONS AND BASIS OF PRESENTATION Kronos Bio, Inc. (Kronos or the Company), a Delaware corporation, was incorporated on June 2, 2017. The Company is an integrated discovery through clinical development biopharmaceutical company, with a focus on developing therapeutics that target the dysregulated transcription that causes cancer and other serious diseases. The Company operates in one business segment, the development of biopharmaceutical products. Basis of Presentation The accompanying financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (SEC) and accounting principles generally accepted in the United States of America (GAAP). Initial Public Offering In October 2020, the Company completed an initial public offering (IPO) of its common stock. In connection with its IPO, the Company issued and sold 15,131,579 shares of its common stock, which included 1,973,684 shares of its common stock issued and sold pursuant to the full exercise of the underwriters’ option to purchase additional shares, at a price to the public of $19.00 per share. As a result of the IPO, the Company received $263.7 million in net proceeds, after deducting underwriting discounts and commissions of $20.1 million and offering expenses of $3.7 million payable by the Company. At the closing of the IPO, all then outstanding shares of convertible preferred stock were automatically converted into 22,687,625 shares of common stock. Following the IPO, there were no shares of convertible preferred stock outstanding. Need for Additional Capital The Company has incurred net losses since its inception and expects to continue to generate net losses for the foreseeable future. The Company’s ultimate success depends on the outcome of its research and development activities. The Company had cash, cash equivalents and investments of $247.9 million as of December 31, 2022. Since inception through December 31, 2022, the Company has incurred a cumulative net operating loss of $396.2 million. Management expects to incur additional losses in the future to fund its operations and conduct product research and development and recognizes the need to raise additional capital. The Company intends to raise additional capital through the issuance of equity securities, debt financings or other sources in order to continue its operations. However, if such financing is not available when needed and at adequate levels, the Company will need to reevaluate its operating plan and may be required to delay the development of its product candidates. The Company expects that its cash and cash equivalents and investments will be sufficient to fund its operations for a period of at least one year from the date the accompanying financial statements are filed with the Securities and Exchange Commission (SEC). The future viability of the Company is dependent on its ability to generate cash from operating activities or to raise additional capital to finance its operations. The Company’s failure to raise capital as and when needed could have a material adverse effect on its financial condition and ability to pursue business strategies. The Company may not be able to obtain financing on acceptable terms, or at all, and the Company may not be able to enter into collaboration arrangements or obtain government grants. The terms of any financing may adversely affect the holdings or the rights of the Company’s stockholders. If the Company is unable to obtain funding, the Company could be forced to delay, reduce, or eliminate its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects. In the event that the Company requires additional funding, there can be no assurance that it will be successful in obtaining sufficient funding on terms acceptable to the Company to fund its continuing operations, if at all. |
Significant Accounting Policies
Significant Accounting Policies, Estimates and Judgments | 12 Months Ended |
Dec. 31, 2022 | |
Accounting Policies [Abstract] | |
SIGNIFICANT ACCOUNTING POLICIES, ESTIMATES AND JUDGMENTS | SIGNIFICANT ACCOUNTING POLICIES, ESTIMATES AND JUDGMENTS Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Significant estimates and assumptions reflected in these financial statements include, but are not limited to, the accrual of research and development expenses, the fair value of investments, income tax uncertainties, the valuation of equity instruments and the incremental borrowing rate for determining the operating lease assets and liabilities. Estimates are periodically reviewed in light of changes in circumstances, facts and experience. Actual results could differ from the Company’s estimates. Research and Development Expenses Research and development (R&D) expenses consist primarily of personnel costs, including salaries, benefits and stock-based compensation, discovery and development research performed by contract research organizations (CROs), investigator grants, materials and supplies, licenses and fees and overhead allocations consisting of various support and facility-related costs. The Company expenses R&D costs as the services are performed or the goods are received. CRO costs are a significant component of R&D expenses. The Company monitors levels of performance under each significant contract through communications with its CROs. The Company accrues costs for discovery research and development performed by CROs over the service periods specified in the contracts and adjusts its estimates, if required, based upon its ongoing review of the level of effort and costs actually incurred by the CROs. All of the Company’s material CRO contracts are terminable by the Company upon written notice and it is generally only liable for actual services completed by the CRO and certain non-cancellable expenses incurred at any point of termination. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Restricted Cash The Company has deposited cash of $2.0 million as of December 31, 2022 and 2021 to secure a letter of credit in connection with the lease of the Cambridge facility (see Note 13). The Company has classified the restricted cash as a noncurrent asset on its balance sheets. Concentration of Credit Risk and Other Risks and Uncertainties Financial instruments, which potentially subject the Company to significant concentrations of credit risk, consist primarily of cash and cash equivalents and investments. The primary objectives for the Company’s investment portfolio are the preservation of capital and the maintenance of liquidity. The Company does not enter into any investment transaction for trading or speculative purposes. The Company’s investment policy limits investments to certain types of instruments such as certificates of deposit, money market instruments, obligations issued by the U.S. government and U.S. government agencies as well as corporate debt securities, and places restrictions on maturities and concentration by type and issuer. The Company maintains cash balances in excess of amounts insured by the FDIC and concentrated within a limited number of financial institutions. The accounts are monitored by management and management believes that the financial institutions are financially sound, and, accordingly, minimal credit risk exists with respect to these financial institutions. As of December 31, 2022 and 2021, the Company has not experienced any credit losses in such accounts or investments. The Company is subject to a number of risks common for biopharmaceutical companies, including, but not limited to, dependency on the clinical and commercial success of its product candidates, ability to obtain regulatory approval of its product candidates, the need for substantial additional financing to achieve its goals, uncertainty of broad adoption of its approved products, if any, by physicians and patients, significant competition, and untested manufacturing capabilities. Investments Investments are available-for-sale and are carried at estimated fair value. The Company’s valuations of available-for-sale securities are generally derived from independent pricing services based upon quoted prices in active markets for similar securities, with prices adjusted for yield and number of days to maturity, or based on industry models using data inputs, such as interest rates and prices that can be directly observed or corroborated in active markets. Management determines the appropriate classification of its investments in debt securities at the time of purchase. Investments with original maturities beyond three months at the date of purchase and which mature at, or less than 12 months from, the balance sheet date are classified as short-term investments. Unrealized gains and losses are excluded from earnings and are reported as components of comprehensive loss. The Company periodically evaluates whether declines in fair values of its available-for-sale securities below their book value are other-than-temporary. This evaluation consists of several qualitative and quantitative factors regarding the severity and duration of the unrealized loss as well as the Company’s ability and intent to hold the available-for-sale security until a forecasted recovery occurs. Additionally, the Company assesses whether it has plans to sell the security or whether it is more likely than not that it will be required to sell any available-for-sale security before recovery of its amortized cost basis. Realized gains and losses and declines in fair value judged to be other than temporary, if any, on available-for-sale securities are included in interest and other income, net. Interest income on investments is included in interest and other income, net on the Company’s statements of operations and comprehensive loss. Fair Value Measurement Assets and liabilities recorded at fair value on a recurring basis in the balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows: Level 1—Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2—Inputs (other than quoted prices included in Level 1) are either directly or indirectly observable for the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3— Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value estimates are made at a discrete point in time based on relevant market information and information about the financial instruments. Fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates. As of December 31, 2022 and 2021, the Company recorded financial assets requiring fair value measurement. The financial assets include cash equivalents and investments. There were no financial liabilities requiring fair value measurement as of December 31, 2022 and 2021. Property and Equipment, Net Property and equipment is stated at cost less accumulated depreciation and amortization. Depreciation and amortization are recognized using the straight-line method over the estimated useful lives of the respective assets . Leasehold improvements are amortized over the lesser of their useful lives or the remaining life of the lease. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation and amortization are removed from the balance sheet and the resulting gain or loss is reflected in the statements of operations and comprehensive loss in the period realized . Repairs and maintenance costs are expensed as incurred. Estimated useful lives in years are generally as follows: Description Estimated Useful Life Lab equipment 3 to 7 years Leasehold improvements Shorter of useful life or lease term Furniture and fixtures 5 to 7 years Computer equipment 3 years Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, current portion of operating lease liabilities, and noncurrent operating lease liabilities on the Company’s balance sheet. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments and initial direct costs incurred, net of lease incentives. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company elected to exclude from its balance sheets recognition of leases having a term of 12 months or less (short-term leases) and elected to not separate lease components and non-lease components for its long-term real-estate leases. Impairment of Long-Lived Assets Long-lived assets, including property and equipment, are reviewed for impairment whenever facts or circumstances either internally or externally may suggest that the carrying value of an asset or asset group may not be recoverable. Should there be an indication of impairment, the Company tests for recoverability by comparing the estimated undiscounted future cash flows expected to result from the use of the asset or asset group and its eventual disposition to the carrying amount of the asset or asset group. Any excess of the carrying value of the asset or asset group over its estimated fair value is recognized as an impairment loss. Stock-Based Compensation The Company has an equity incentive plan under which various types of equity-based awards are granted, including stock options, restricted stock awards (RSAs), and restricted stock units (RSUs). The Company measures stock-based awards granted to employees and nonemployees based on the fair value on the date of the grant and recognizes stock-based compensation expense of those awards over the requisite service period, which is generally the vesting period of the respective award. The Company calculates the fair value measurement of stock options using the Black-Scholes option-pricing model. Forfeitures are accounted for as they occur. The fair value of the RSA and RSUs is equal to the fair value of the Company’s common stock on the grant date of the award. Income Taxes The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. Under this method, deferred tax assets and liabilities are determined based on differences between the financial statement carrying amounts and the tax bases of the assets and liabilities using the enacted tax rates in effect in the years in which the differences are expected to reverse. A valuation allowance against deferred tax assets is recorded if, based on the weight of the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company accounts for uncertainty in income taxes recognized in the financial statements by applying a two-step process to determine the amount of tax benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the taxing authorities. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The provision for income taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, that are considered appropriate as well as the related net interest and penalties. Comprehensive Loss Comprehensive loss includes net loss as well as other changes in stockholders’ equity (deficit) that result from transactions and economic events other than those with stockholders. For the years ended December 31, 2022 and 2021, other comprehensive loss consisted of unrealized gains and losses from available-for-sale securities. Net Loss Per Share Basic net loss per share is computed using the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed using the sum of the weighted-average number of shares of common stock outstanding during the period and the effect of dilutive securities. In periods in which the Company reports a net loss, diluted net loss per share is the same as basic net loss per share, since dilutive shares of common stock are not assumed to have been issued if their effect on net loss per share is anti-dilutive. Recent Accounting Pronouncements In May 2021, the FASB issued ASU No. 2021-04, Earnings Per Share (Topic 260), Debt—Modifications and Extinguishments (Subtopic 470-50), Compensation—Stock Compensation (Topic 718), and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options (a consensus of the FASB Emerging Issues Task Force) , which clarifies and reduces diversity in accounting for modifications or exchanges of freestanding equity-classified written call options (for example, warrants) that remain equity classified after modification or exchange. This guidance was effective for the Company in the first quarter of 2022. The effect on the Company’s financial statements and related disclosures was not material. The Company continues to monitor new accounting pronouncements issued by the FASB and does not believe any accounting pronouncements issued through the date of this report will have a material impact on the Company's consolidated financial statements. |
Fair Value Measurements
Fair Value Measurements | 12 Months Ended |
Dec. 31, 2022 | |
Fair Value Disclosures [Abstract] | |
FAIR VALUE MEASUREMENTS | FAIR VALUE MEASUREMENTSThe Company follows authoritative accounting guidance, which among other things, defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The Company measures and reports its cash equivalents and investments at fair value. Money market funds are measured at fair value on a recurring basis using quoted prices and are classified as Level 1. Investments measured at fair value based on inputs other than quoted prices that are derived from observable market data are classified as Level 2. Financial assets and liabilities subject to fair value measurements on a recurring basis and the level of inputs used in such measurements by major security type as of December 31, 2022 and 2021 were as follows: December 31, 2022 Level 1 Level 2 Level 3 Fair Value (in thousands) Financial Assets: Money market funds $ 49,003 $ — $ — $ 49,003 Certificates of deposit 490 — — 490 Commercial paper — 1,667 1,667 Corporate bonds — 30,657 — 30,657 U.S. agency securities — 13,000 — 13,000 U.S. treasury securities 138,734 — — 138,734 Total financial assets $ 188,227 $ 45,324 $ — $ 233,551 December 31, 2021 Level 1 Level 2 Level 3 Fair Value (in thousands) Financial Assets: Money market funds $ 188,923 $ — $ — $ 188,923 Corporate bonds — 63,620 — 63,620 U.S. treasury securities 79,394 — — 79,394 Total financial assets $ 268,317 $ 63,620 $ — $ 331,937 The carrying amounts of accounts payable and accrued expenses approximate their fair values due to their short-term maturities. The Company’s Level 2 securities are valued using third-party pricing sources. The pricing services utilize industry standard valuation models, including both income- and market-based approaches, for which all significant inputs are observable, either directly or indirectly. The Company did not have any financial assets or liabilities as of December 31, 2022 and 2021 that required Level 3 inputs. |
Investments
Investments | 12 Months Ended |
Dec. 31, 2022 | |
Investments, Debt and Equity Securities [Abstract] | |
INVESTMENTS | INVESTMENTS The fair value and amortized cost of available-for-sale securities by major security type as of December 31, 2022 and 2021 were as follows: December 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Money market funds $ 49,003 $ — $ — $ 49,003 Certificates of deposit 490 — — 490 Commercial paper 1,667 — — 1,667 Corporate bonds 30,683 3 (29) 30,657 U.S. agency securities 13,024 — (24) 13,000 U.S. treasury securities 139,477 4 (747) 138,734 Total cash equivalents and investments $ 234,344 $ 7 $ (800) $ 233,551 December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Money market funds $ 188,923 $ — $ — $ 188,923 Corporate bonds 63,647 2 (29) 63,620 U.S. treasury securities 79,406 — (12) 79,394 Total cash equivalents and investments $ 331,976 $ 2 $ (41) $ 331,937 Marketable securities that had been in unrealized loss positions as of December 31, 2022 and 2021 were in an unrealized loss position for less than twelve months. These available-for-sale debt securities were classified on the Company’s balance sheets as of December 31, 2022 and 2021 as: Fair Value December 31, 2022 2021 (in thousands) Cash equivalents $ 61,577 $ 190,698 Short-term investments 162,212 141,239 Long-term investments 9,762 — Total cash equivalents and investments $ 233,551 $ 331,937 The fair values of available-for-sale securities by contractual maturity as of December 31, 2022 and 2021 were as follows: December 31, 2022 2021 (in thousands) Due in 1 year or less $ 174,786 $ 143,014 Due in 1 to 2 years 9,762 — Total $ 184,548 $ 143,014 As of December 31, 2022 and 2021, the remaining contractual maturities of available-for-sale securities were less than two years, respectively. There have been no significant realized losses on available-for-sale securities for any of the periods presented in the accompanying financial statements. As of December 31, 2022 and 2021, unrealized losses on available-for-sale securities are not attributed to credit risk. The Company believes that it is more likely than not that investments in an unrealized loss position will be held until maturity and all interest and principal will be received. The Company believes that an allowance for credit losses is unnecessary because the unrealized losses on certain of the Company’s available-for-sale securities are due to market factors. To date, the Company has not recorded any impairment charges on available-for-sale securities. |
Prepaid Expenses And Other Curr
Prepaid Expenses And Other Current Assets | 12 Months Ended |
Dec. 31, 2022 | |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | |
PREPAID EXPENSES AND OTHER CURRENT ASSETS | PREPAID EXPENSES AND OTHER CURRENT ASSETS Prepaid expenses and other current assets consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Accrued interest on short-term available-for-sale securities $ 572 $ 816 Prepaid equipment service contracts 289 360 Prepaid external research and development and outside services 2,276 3,074 Prepaid software 905 624 Prepaid insurance 1,630 2,644 Other prepaid expenses 434 527 Total prepaid expenses and other current assets $ 6,106 $ 8,045 |
Property and Equipment, Net
Property and Equipment, Net | 12 Months Ended |
Dec. 31, 2022 | |
Property, Plant and Equipment [Abstract] | |
PROPERTY AND EQUIPMENT, NET | PROPERTY AND EQUIPMENT, NET Property and equipment, net consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Property and equipment: Lab equipment $ 8,475 $ 8,164 Leasehold improvements 9,348 9,335 Furniture and fixtures 619 596 Computer equipment 58 44 Total property and equipment 18,500 18,139 Less: Accumulated depreciation and amortization (5,515) (3,259) Total property and equipment, net $ 12,985 $ 14,880 |
Accrued Expenses and Current Po
Accrued Expenses and Current Portion of Other Liabilities | 12 Months Ended |
Dec. 31, 2022 | |
Payables and Accruals [Abstract] | |
ACCRUED EXPENSES AND CURRENT PORTION OF OTHER LIABILITIES | ACCRUED EXPENSES AND CURRENT PORTION OF OTHER LIABILITIES Accrued expenses consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Accrued compensation $ 4,277 $ 4,570 External research and development 7,694 2,655 Accrued outside services 945 1,598 Accrued taxes 40 — Other accrued expenses 7 240 Total accrued expenses $ 12,963 $ 9,063 Current portion of other liabilities consist of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Current portion of unvested early exercised share liability 891 1,364 ESPP withholdings 238 92 Total current portion of other liabilities $ 1,129 $ 1,456 |
Stockholders' Equity (Deficit)
Stockholders' Equity (Deficit) | 12 Months Ended |
Dec. 31, 2022 | |
Equity [Abstract] | |
STOCKHOLDERS' EQUITY (DEFICIT) | STOCKHOLDERS’ EQUITY (DEFICIT) Preferred Stock Pursuant to the Amended and Restated Certificate of Incorporation filed on October 14, 2020, as amended, the Company is authorized to issue a total of 10,000,000 shares of undesignated preferred stock, par value $0.001, of which no shares were issued or outstanding as of December 31, 2022 and 2021. Common Stock Pursuant to the Company’s amended and restated certificate of incorporation filed on October 14, 2020, as amended, the Company is authorized to issue a total of 200,000,000 shares of its common stock, par value $0.001. As of December 31, 2022 and 2021, there were 56,967,436 and 55,703,327 shares issued and outstanding, respectively. Each share of common stock entitles the holder to one vote on all matters submitted to a vote of the Company's stockholders. Subject to the rights of the Preferred Stock, holders of the Company’s common stock are entitled to receive dividends, as may be declared by the Board of Directors. As of December 31, 2022, no dividends have been declared to date. |
Stock-Based Compensation
Stock-Based Compensation | 12 Months Ended |
Dec. 31, 2022 | |
Share-Based Payment Arrangement [Abstract] | |
STOCK-BASED COMPENSATION | STOCK-BASED COMPENSATION 2020 Equity Incentive Plan In October 2020, the Company adopted its 2020 Equity Incentive Plan (the 2020 Plan) which replaced the 2017 Equity Incentive Plan (Prior Plan) upon completion of the IPO. The 2020 Plan provides for the grant of incentive stock options or nonqualified stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance awards and other forms of awards to employees, directors, and consultants of the Company. Under the 2020 Plan, the maximum number of shares of common stock that may be issued increased to 11,938,152 shares. The number of shares of common stock reserved for issuance under the 2020 Plan will automatically increase each year for a period of ten years, beginning in 2021 and continuing through 2030, in an amount equal to (1) 5.0% of the total numbers of shares of the Company’s common stock outstanding on December 31st of the immediately preceding year, or (2) a lesser number of shares determined by the Board of Directors no later than December 31st of the immediately preceding year. As a result of the automatic annual increases, the maximum number of shares of common stock that may be issued under the 2020 Plan as of December 31, 2022 was 17,568,821 shares. Under the 2020 Plan, the exercise prices, vesting, and other restrictions are determined at the discretion of the Board of Directors, or a designated committee thereof, except that the exercise price per share of stock options may not be less than 100% of the fair market value of the common stock on the date of grant and the term of stock option may not be greater than 10 years. The Company recognizes the impact of forfeitures on stock-based compensation expense as forfeitures occur. The Company applies the straight-line method of expense recognition to all awards with only service-based vesting conditions. Vesting periods are determined at the discretion of the Board of Directors. Stock options typically vest over four years. The maximum contractual term is 10 years. As of December 31, 2022 and 2021, there were 4,098,939 and 4,647,580 shares, respectively, reserved by the Company under the 2020 Plan for the future issuance of equity awards. Stock Option Valuation The Company estimates the fair value of each stock option grant on the date of grant using the Black-Scholes option-pricing model. This model requires the use of assumptions to determine the fair value of stock-based awards, including: • Fair Value of Common Stock —For grants before the completion of the IPO in October 2020 when the Company was a privately held company with no public market for its common stock, the fair value of its common stock underlying share-based awards was estimated on each grant date by its Board of Directors. In order to determine the fair value of our common stock underlying option grants, the Company’s Board of Directors considered, among other things, valuations of its common stock prepared by an unrelated third-party valuation firm in accordance with the guidance provided by the American Institute of Certified Public Accounts Practice Guide, Valuation of Privately-Held-Company Equity Securities Issued as Compensation . For all grants subsequent to our IPO in October 2020, the fair value of common stock was determined by taking the closing price per share of common stock as reported on the Nasdaq Stock Market. • Expected Term —The expected term represents the period that the stock-based awards are expected to be outstanding. The Company uses the simplified method to determine the expected term, which is based on the average of the time-to-vesting and the contractual life of the options. • Expected Volatility —The expected volatility for the years ended December 31, 2022 and 2021 is estimated based on the average historical volatilities of common stock of comparable publicly traded entities over a period equal to the expected term of the stock option grants. The comparable companies are chosen based on their size, stage in the product development cycle or area of specialty. The Company will continue to apply this process until a sufficient amount of historical information regarding the volatility of its own stock price becomes available. • Risk-Free Interest Rate —The risk-free interest rate is based on the U.S. Treasury yield in effect at the time of grant for zero-coupon U.S. Treasury notes with maturities approximately equal to the expected term of the awards. • Expected Dividend —The Company has never paid dividends on its common stock and has no plans to pay dividends on its common stock. Therefore, the Company used an expected dividend yield of zero. The Black-Scholes option-pricing model assumptions that the Company used to determine the grant-date fair value of stock options for the years ended December 31, 2022 and 2021 were as follows, presented on a weighted-average basis: Year Ended December 31, 2022 2021 Fair value of common stock per share $ 6.48 $ 25.99 Expected term (in years) 5.91 6.01 Expected volatility 78.21% 85.26% Risk-free interest rate 2.28% 0.90% Expected dividend —% —% The weighted-average grant-date fair value per share of stock options granted, using the assumptions listed above, was $5.57 and $18.52, during the years ended December 31, 2022 and 2021, respectively. Stock Options Stock option activity under the 2020 Plan as of December 31, 2022 is summarized as follows: Number of Options Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Balance at December 31, 2021 6,590,400 $ 14.33 Granted 2,730,338 6.48 Forfeited (1,192,074) 18.54 Exercised (673,999) 2.72 Balance at December 31, 2022 7,454,665 $ 11.83 7.69 $ 54 Exercisable at December 31, 2022 3,394,398 $ 11.94 7.38 $ 53 Unvested and expected to vest at December 31, 2022 4,060,267 $ 11.75 7.94 $ 1 The aggregate intrinsic values of options outstanding, exercisable, vested and expected to vest were calculated as the difference between the exercise price of the options and the closing price of the Company’s common stock on the Nasdaq Global Select Market on December 31, 2022. The intrinsic value of options exercised for the years ended December 31, 2022 and 2021 was $2.0 million and $23.8 million, respectively, determined as of the applicable date of exercise. There was no future tax benefit related to options exercised, as the Company had accumulated net operating losses as of December 31, 2022 and December 31, 2021. For the years ended December 31, 2022 and 2021 total stock-based compensation related to stock options was classified in the Company’s statements of operations and comprehensive loss as follows: Year Ended December 31, 2022 2021 (in thousands) Research and development expenses $ 8,464 $ 7,753 General and administrative expenses 10,414 8,406 Total stock-based compensation expense $ 18,878 $ 16,159 As of December 31, 2022 and 2021, there was $35.4 million and $49.9 million of unrecognized stock-based compensation related to stock options, respectively, which is expected to be recognized over a weighted average period of 2.25 and 2.93 years, respectively. 2020 Employee Stock Purchase Plan In October 2020, the Company adopted its 2020 Employee Stock Purchase Plan (ESPP), which initially reserved 688,000 shares of the Company’s common stock for employee purchase under terms and provisions established by the Board of Directors. The number of shares of our common stock reserved for issuance under the ESPP automatically increases in 2021 and continuing through 2030, by the lesser of (i) 1.0% of the to tal number of shares of common stock outstanding on December 31st of the immediately preceding year, and (ii) 1,376,000 shares, e xcept before the date of any increase, the Board of Directors may determine that such increase will be less than the amount set forth in clauses (i) and (ii). Effective January 1, 2022 and 2021 , the number of shares authorized under the ESPP for employee purchases increased by 565,798 and 560,335 shares, respectively. The ESPP is intended to qualify as an ‘employee stock purchase plan’ under Section 423 of the Internal Revenue Code. Under the current offering adopted pursuant the ESPP, each offering period shall not exceed 27 months, with shorter duration purchase periods within each offering. Employees are eligible to participate if they are employed by the Company for at least 20 hours per week and more than five months of the year. The Company issued and sold 260,765 and 95,723 shares of common stock under the ESPP during the years ended December 31, 2022 and 2021. The Company has 1,553,368 shares reserved for future issuance under the ESPP as of December 31, 2022. Under the ESPP, employees may purchase common stock through payroll deductions at a price equal to 85% of the lower of the fair market value of common stock on the first trading day of each offering period or on the purchase date. The initial offering period commenced on October 8, 2020, the date of the underwriting agreement related to the Company’s IPO. A new offering (Subsequent Offering) automatically began in 2021, and a new offering will begin every six months thereafter over the term of the ESPP. Each Subsequent Offering will be approximately 24 months long and will consist of four purchase periods (with the purchase dates occurring on June 30 and December 31 each year during the term of the Subsequent Offering). Contributions under the ESPP are limited to a maximum of 15% of an employee’s eligible compensation. The fair values of the rights granted under the ESPP were calculated using the following assumptions: Year Ended December 31, 2022 2021 Expected term (in years) 0.49 - 2.00 0.50 - 2.00 Expected volatility 56.55% - 87.15% 71.67% - 94.85% Risk-free interest rate 0.22% - 2.84% 0.05% - 0.25% Dividend yield —% —% For the years ended December 31, 2022 and 2021, total stock-based compensation related to the ESPP was $1.1 million and $1.4 million, respectively, with $0.3 million and $0.3 million, respectively, recorded in general and administrative expenses and $0.8 million and $1.1 million, respectively, recorded in research and development expenses in the statements of operations and comprehensive loss. Restricted Stock Restricted stock awards and units as of December 31, 2022 are summarized as follows: Number of Restricted Stock Weighted-Average Grant Date Fair Value Weighted-Average Remaining Vesting Life Aggregate Intrinsic Value (in years) (in thousands) Unvested at December 31, 2021 787,719 $ 26.88 Granted - restricted stock units 2,061,081 5.50 Vested and converted to shares (329,345) 27.51 Forfeited (221,710) 11.50 Unvested at December 31, 2022 2,297,745 $ 9.18 1.58 $ 3,722 Vested and expected to vest at December 31, 2022 2,297,745 $ 9.18 1.58 $ 3,722 The Company recorded stock-based compensation expense for the RSAs of $0.1 million and $0.1 million in general and administrative expenses and zero and $5,000 in research and development expenses in the statements of operations and comprehensive loss for the years ended December 31, 2022 and 2021, respectively. As of December 31, 2022, there was $0.2 million of unrecognized stock-based compensation related to RSAs, which is expected to be recognized over a weighted average period of 1.58 years. The total grant date fair value for RSAs vested during the years ended December 31, 2022 and 2021 was $0.1 million and $0.2 million, respectively. For the years ended December 31, 2022 and 2021, the Company issued 2,061,081 and 347,267, restricted stock units (RSUs), respectively, to executive officers and non-executive employees pursuant to the 2020 Plan. These RSUs have a three year vest period and in order to vest, the holder is required to provide service to the Company. The Company recognized $11.0 million of stock-based compensation expense related to the RSUs for the year ended December 31, 2022, of which $5.7 million and $5.3 million are recorded in research and development and general and administrative expenses, respectively, in the current year statement of operations and comprehensive loss. The Company recognized $8.5 million of stock-based compensation expense related to the RSUs for the year ended December 31, 2021, of which $4.1 million and $4.4 million are recorded in research and development and general and administrative expenses, respectively, in the current year statement of operations and comprehensive loss. As of December 31, 2022, there was $15.7 million of unrecognized stock-based compensation related to RSUs, which is expected to be recognized over a weighted average period of 1.32 years. As of December 31, 2022 and 2021, 295,053 and 188,470 RSUs have vested, respectively. Stock-Based Compensation Summary Total stock-based compensation expense was classified in the Company’s statements of operations and comprehensive loss for the years ended December 31, 2022 and 2021 as follows for stock options, RSAs, RSUs, and ESPP: Year Ended December 31, 2022 2021 (in thousands) Research and development expenses $ 14,974 $ 12,961 General and administrative expenses 16,171 13,250 Total stock-based compensation expense $ 31,145 $ 26,211 Early Exercised Options The terms of certain stock options granted under the Prior Plan allow the holder to exercise options prior to vesting. The shares related to early exercised stock options are subject to the Company’s lapsing repurchase right upon termination of employment or service on the Board of Directors at the lesser of the original purchase price or fair market value at the time of repurchase. In order to vest, the holders are required to provide continued service to the Company. The early exercise by an employee or consultant of a stock option is not considered to be a substantive exercise for accounting purposes, and therefore the payment received by the employer for the exercise price is recognized as a liability. For accounting purposes, unvested early exercised shares are not considered issued and outstanding and therefore are not reflected as issued and outstanding in the accompanying statements of convertible preferred stock and stockholders' equity (deficit) until the awards vest. The deposits received are initially recorded in current portion of other liabilities and other noncurrent liabilities for the noncurrent portion. The liabilities are reclassified to common stock and paid-in capital as the repurchase right lapses. During the years ended December 31, 2022 and 2021, there have been no early exercised options. At December 31, 2022 and 2021, there was $0.9 million and $1.4 million recorded in current portion of other liabilities, and $0.2 million and $1.1 million recorded in other noncurrent liabilities, respectively, related to shares held by employees and nonemployees that were subject to repurchase. |
Income Taxes
Income Taxes | 12 Months Ended |
Dec. 31, 2022 | |
Income Tax Disclosure [Abstract] | |
INCOME TAXES | INCOME TAXES The Company recorded a small amount of income tax expense related to state minimum taxes for the year ended December 31, 2022 and did not record any income tax expense for the years ended December 31, 2021. The Company has incurred net operating losses for all the periods presented and has not reflected any benefit of such net operating loss carryforwards in the accompanying financial statements. The Company has recorded a full valuation allowance against all of its deferred tax assets as it is not more likely than not that such assets will be realized in the near future. Reconciliation of the income tax expense calculated at the statutory rate to our zero expense for income taxes for the years ended December 31, 2022 and 2021 were as follows: Year Ended December 31, 2022 2021 (in thousands) Tax benefit at federal statutory rate $ (27,973) $ (31,726) State taxes (5,017) (7,138) Research tax credits (15,012) (597) Change in valuation allowance 42,664 38,846 Stock based compensation 5,181 1,212 Other 157 (597) Expense/(Benefit) for income taxes $ — $ — The Company’s deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets or liabilities for financial reporting purposes and the amounts used for income tax purposes as of December 31, 2022 and 2021. Significant components of the Company’s deferred tax assets and liabilities are as follows: Year Ended December 31, 2022 2021 (in thousands) Deferred tax assets: Lease liabilities $ 7,948 $ 8,750 Stock-based compensation 4,755 2,777 Accrued compensation 1,093 1,320 Net operating loss carryforwards 58,628 52,052 Tax credit carryforwards 15,963 1,296 Capitalized Research and Development Cost 18,857 — Other 17 — Total deferred tax assets 107,261 66,195 Valuation allowance (100,656) (58,713) Net deferred tax assets 6,605 7,482 Deferred tax liabilities: Right-of-use assets (6,316) (6,973) Fixed assets and intangibles (289) (509) Total deferred tax liabilities (6,605) (7,482) Net deferred tax assets $ — $ — The Company records a valuation allowance for certain temporary differences for which it is more likely than not that it will not receive future tax benefits. The Company assesses its past earnings history, income tax planning and projections of future net income when determining whether it is more likely than not future tax benefits will be realized. Based on the Company’s history of losses, the Company has maintained a full valuation allowance of approximately $100.7 million and $58.7 million for the years ended December 31, 2022 and 2021, respectively. The change in valuation allowance of $41.9 million is due to increases in net operating losses and other deferred tax assets due to current year activity. The following table sets forth the Company’s federal and state net operating loss and research credit carryforwards as of December 31, 2022: Amount Expiration (in thousands) Net operating losses, federal $ 229,617 Indefinite Net operating losses, federal $ 601 2037 Net operating losses, state $ 162,694 2037-2042 Tax credits, federal $ 13,775 2037-2042 Tax credits, state 6,358 2037 Current federal and state tax laws include substantial restrictions on the utilization of net operating loss and tax credit carryforwards in the event of an ownership change as defined under Section 382 of the Internal Revenue Code of 1986, as amended. Accordingly, the Company’s ability to use these carryforward attributes may be limited as a result of such ownership change. The Company applies the provisions of ASC Topic 740 to account for uncertain income tax positions. A reconciliation of the beginning and ending amount of unrecognized tax benefits were as follows: Year Ended December 31, 2022 2021 (in thousands) Balance at beginning of the year $ 246 $ 141 Additions based on tax positions related to the current year 1,993 105 Additions to tax positions of prior years 796 — Balance at the end of the year $ 3,035 $ 246 It is the Company’s policy to record penalties and interest related to income taxes as a component of income tax expense. The Company has not recorded any interest or penalties related to income taxes during the years ended December 31, 2022 and 2021. Unrecognized tax benefits are not expected to change during the next 12 months. The reversal of the unrecognized tax benefits would not affect the effective tax rate. The Company is subject to examination by U.S. federal and state tax authorities for all years since its inception. Beginning January 1, 2022, the Tax Cuts and Jobs Act enacted in 2017, eliminates the option to deduct research and development expenditures in the current year and requires taxpayers to capitalize and amortize pursuant to IRC Section 174. As a result, we recognized an increase in our deferred tax assets due to the capitalization of $73.8 million. Given such amount was offset by our valuation allowance there were no material impacts to the financial statements outside of the deferred tax table. During August 2022, the CHIPS and Science Act (“CHIPS Act”) and Inflation Reduction Act (“IRA”) were enacted, neither of which are expected to have a material impact to our financial statements. The American Rescue Plan Act (“ARA”) was signed into law on March 11, 2021. We do not expect the ARA to have a material impact on our financial statements but given potential changes to IRC Section 162(m) will take place in 2027, we will continue to monitor and assess. The following table shows the change in the deferred tax valuation as follows: Year Ended December 31, 2022 2021 (in thousands) Beginning Balance, January 1 $ 58,713 $ 20,797 Change charged to expense/(income) $ 41,943 $ 37,916 Ending Balance, December 31 $ 100,656 $ 58,713 |
Net Loss Per Share
Net Loss Per Share | 12 Months Ended |
Dec. 31, 2022 | |
Earnings Per Share [Abstract] | |
NET LOSS PER SHARE | NET LOSS PER SHARE The following table summarizes the computation of basic and diluted net loss per share of the Company for the years ended December 31, 2022 and 2021: Year Ended December 31, 2022 2021 (in thousands, except share and per share amounts) Net loss $ (133,204) $ (151,078) Weighted-average common stock outstanding, basic and diluted 56,201,398 54,753,599 Net loss per share, basic and diluted $ (2.37) $ (2.76) The Company’s potentially dilutive securities, which include options to purchase shares of the Company's common stock and restricted stock awards subject to future vesting, have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. Therefore, the weighted-average number of shares of common stock outstanding used to calculate both basic and diluted net loss per share is the same. The Company excluded the following potential shares of common stock, presented based on amounts outstanding at each stated period end, from the computation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect: Year Ended December 31, 2022 2021 Stock options to purchase common stock 7,150,339 5,802,435 Early exercised stock options subject to future vesting 304,326 787,965 Restricted stock awards subject to future vesting 54,297 88,589 Restricted stock units subject to future vesting 2,243,448 699,129 Total 9,752,410 7,378,118 In addition to the potentially dilutive securities noted above, the Company also has the option under its agreement with Tempus to issue common shares upon the achievement of specified milestones (see Note 12). Because the necessary conditions for issuance of the shares had not been met as of December 31, 2022, the Company excluded these shares from the table above and from the calculation of diluted net loss per share for the year ended December 31, 2022. |
Commitment and Contingencies
Commitment and Contingencies | 12 Months Ended |
Dec. 31, 2022 | |
Commitments and Contingencies Disclosure [Abstract] | |
COMMITMENTS AND CONTINGENCIES | COMMITMENTS AND CONTINGENCIES R&D Services Agreement In October 2021, the Company entered into an agreement for research and development services (Tempus Agreement) with Tempus Labs, Inc. (Tempus), pursuant to which Tempus agreed to provide the Company with research and development services for a period of three years. The three primary services are analytical services, data licensing, and organoid services. The Company intends to utilize the services contemplated under the Tempus Agreement to advance the development of KB-0742 and lanraplenib. In consideration for the access to the services throughout the term of the Tempus Agreement, the Company has agreed to pay an annual minimum commitment of $1.5 million in year one, $2.0 million in year two, and $2.5 million in year three. Payments are made in quarterly installments. As of December 31, 2022, the Company has paid $1.1 million under the Tempus Agreement. As of December 31, 2021, the Company had not made any payments under the Tempus Agreement. In addition, the Company is required to make milestone payments upon successful achievement of certain regulatory milestones for KB-0742, lanraplenib, and other discovery pipeline compounds up to a combined maximum of $22.4 million. For each milestone payment that becomes due, the Company has the right to pay up to 50% of such milestone payment amount in shares of its common stock as long as certain regulatory requirements are met. Asset Purchase Agreement In July 2020, the Company entered into the Gilead Asset Purchase Agreement with Gilead Sciences, Inc. (Gilead), pursuant to which the Company acquired certain assets from and assumed certain liabilities of Gilead related to lanraplenib or entospletinib, and patents and other intellectual property covering or related to the development, manufacture and commercialization of lanraplenib or entospletinib. In consideration for such assets, on the date of the Gilead Asset Purchase Agreement, the Company made a $3.0 million upfront cash payment and issued a $3.0 million principal amount convertible promissory note, which was settled in exchange for 188,567 shares of common stock in connection with the closing of the Company's IPO at a settlement price of $16.15 per share. The Company also made a $0.7 million payment to reimburse Gilead for certain liabilities assumed by the Company pursuant to the Gilead Asset Purchase Agreement. In addition, the Company is required to make milestone payments upon successful achievement of certain regulatory and sales milestones for lanraplenib, entospletinib, and other SYK inhibitor compounds covered by the patent rights acquired pursuant to the Gilead Asset Purchase Agreement and developed by the Company as a back-up to entospletinib or lanraplenib (Other Compounds). Upon initiation of the Company’s registrational Phase 3 clinical trial of entospletinib in combination with induction chemotherapy in acute myeloid leukemia patients with NPM1 mutations in December 2021, the Company paid a milestone payment to Gilead of $29.0 million. Upon successful completion of certain other regulatory milestones in the United States, European Union and United Kingdom for lanraplenib, entospletinib and any Other Compounds, across up to two distinct indications, the Company will be required to pay to Gilead an aggregate total of $51.3 million. Upon achieving certain thresholds for the aggregate annual net sales of lanraplenib, entospletinib and any Other Compounds combined, the Company would owe to Gilead potential milestone payments totaling $115.0 million. Gilead is also eligible to receive (i) tiered marginal royalties ranging from high-single digits to the mid-teens on annual worldwide net sales of lanraplenib, (ii) tiered marginal royalties ranging from the very low-teens to high-teens on annual worldwide net sales of entospletinib, and (iii) tiered marginal royalties ranging from low single digits to mid-single digits on annual worldwide net sales of any Other Compounds. The royalties in the foregoing clauses are subject to reduction, on a country-by-country basis, for products not covered by certain claims within the assigned patents, for generic entry and, in the case of lanraplenib and entospletinib, for any royalties paid for future licenses of third party intellectual property required to develop or commercialize lanraplenib or entospletinib. The Company’s royalty obligation with respect to a given product in a given country begins upon the first commercial sale of such product in such country and ends on the latest of (i) expiration of the last claim of a defined set of the assigned patent rights covering such product in such country; (ii) loss of exclusive data or marketing rights to such product in such country; or (iii) 10 years from the first commercial sale of such product in such country. Under the Gilead Asset Purchase Agreement, the Company is required to use commercially reasonable efforts to develop, obtain regulatory approval for and commercialize either lanraplenib or entospletinib. Purchase Commitments In the normal course of business, the Company enters into contracts with CROs for preclinical and clinical studies and other vendors for other services and products. These agreements generally provide for termination or cancellation, other than for costs already incurred and certain wind down costs that may be associated with the termination of a contract or clinical trial program. Contingencies In the normal course of business, the Company enters into contracts and agreements that contain a variety of representations and warranties and provide for general indemnifications. The Company’s exposure under these agreements is unknown, because it involves claims that may be made against the Company in the future, but have not yet been made. The Company accrues a liability for such matters when it is probable that future expenditures will be made and such expenditures can be reasonably estimated. Indemnification In accordance with the Company’s amended and restated certificate of incorporation and amended and restated bylaws, the Company has indemnification obligations to its officers and directors for certain events or occurrences, subject to certain limits, while they are serving in such capacity. There have been no claims to date, and the Company has a directors and officers liability insurance policy that may enable it to recover a portion of any amounts paid for future claims. |
Leases
Leases | 12 Months Ended |
Dec. 31, 2022 | |
Leases [Abstract] | |
LEASES | LEASES In March 2020, the Company entered into an 11-year lease agreement to move its research and development operations from 21 Erie Street, Cambridge, Massachusetts, to a 40,514 square-feet facility at 301 Binney Street, Cambridge, Massachusetts (Cambridge facility). The lease commenced on February 28, 2020 with an initial annual base rent of $4.1 million and payments. The initial rent payment was paid as of September 30, 2020, with rent payments escalating 3.0% annually after the initial 12 payments. As discussed in Note 2, the Company executed a letter of credit for $2.0 million in connection with the lease. The lease includes $3.7 million in certain tenant improvement allowances, which the Company included in its calculation of the right-of-use asset in the lease at commencement. As of December 31, 2022, $3.7 million in improvement costs incurred by the Company were reimbursed by the lessor are now included within the total lease liability. In connection with the lease, the Company recognized an operating lease right-of-use asset of $21.9 million and an aggregate lease liability of $28.0 million on the December 31, 2022 balance sheet. The remaining lease term is 8.2 years, and the estimated incremental borrowing rate is 8.50% . In February 2021, the Company entered into a new lease agreement for its office space in San Mateo, California to move from its current suites, totaling 8,075 square-feet, to a larger suite totaling 17,340 square-feet, and a lease commencement date in the second quarter of 2021. The Company accounted for this change in lease term of the original suites as a modification of the originally amended lease. As a result of the modification, the operating right-of-use asset and lease liability were remeasured as of the modification date. The new 17,340 square foot suite will be treated as a separate lease for accounting purposes. The initial annual base rent for the new space will be $1.2 million, and such amount will increase by 3% annually on each anniversary of the new premises commencement date. In connection with the larger space leased, the Company has also made an additional one-time cash security deposit in the amount of $59,000. The new lease commenced in April 2021 and the new lease agreement extends the termination date from April 30, 2025 to June 1, 2026. In connection with the lease, the Company recognized an operating lease right-of-use asset of $2.8 million and $3.3 million an aggregate lease liability of $3.7 million and $4.1 million as of December 31, 2022 and December 31, 2021. The remaining lease term is 3.5 years, and the estimated incremental borrowing rate is 11.18%. The following table summarizes the presentation of the Company’s operating leases in its balance sheets as of December 31, 2022 and 2021: Balance Sheet Caption December 31, 2022 2021 (in thousands) Assets: Operating lease assets $ 24,707 $ 26,904 Liabilities: Current portion of operating lease liabilities $ 2,347 $ 2,109 Noncurrent operating lease liabilities 28,744 31,653 Total operating lease liabilities $ 31,091 $ 33,762 The following table summarizes the effect of operating lease costs in the Company’s statements of operations and comprehensive loss for the years ended December 31, 2022 and 2021 : Statement of Operations and Comprehensive Loss Caption Year Ended December 31, 2022 2021 (in thousands) Research and development $ 3,068 $ 3,308 General and administrative 2,043 2,015 Total operating lease cost $ 5,111 $ 5,323 The Company made cash payments of $5.7 million and $4.4 million under the lease agreements during the years ended December 31, 2022 and 2021, respectively. The undiscounted future non-cancellable lease payments under the Company's operating leases as of December 31, 2022 for the next five years and thereafter is expected to be as follows: Period Ending December 31, Amount (in thousands) 2023 $ 5,130 2024 5,749 2025 5,921 2026 5,405 2027 and thereafter 21,298 Total undiscounted lease payments 43,503 Less: Present value adjustment (12,412) Present value of operating lease liabilities $ 31,091 |
Related Parties
Related Parties | 12 Months Ended |
Dec. 31, 2022 | |
Related Party Transactions [Abstract] | |
RELATED PARTIES | RELATED PARTIESOn December 1, 2017, the Company entered into a services agreement with Two River Consulting, LLC (Two River) to provide various clinical development, operational, managerial, accounting and financial, and administrative services to the Company. On December 31, 2021, the Company amended the agreement to limit the scope to accounting and managerial consulting services. Arie Belldegrun, M.D., FACS, the Chair of the Board of Directors, is the Chair of Two River. Mr. Joshua Kazam and Mr. David Tanen, each a director of the Company, are each partners of Two River. Mr. Christopher Wilfong, a strategic advisor to the Company, is an Operating Partner of Two River and Mr. Sean Algeo, serving as a financial consultant to the Company, is the Chief Financial Officer of Two River. During the years ended December 31, 2022 and 2021, the Company incurred expenses of $0.1 million and $0.3 million, respectively, for these services.In 2019, the Company entered into a consulting agreement with Bellco Capital, LLC (Bellco) to provide various executive services to the Company. Arie Belldegrun, M.D., FACS, the Chair of the Board of Directors, is the Chairman of Bellco. Rebecka Belldegrun, M.D., who served as a director of the Company through January 25, 2021, is the President and Chief Executive Officer of Bellco. During the years ended December 31, 2022 and 2021, the Company incurred expenses of $25,200 and $129,000, respectively, for these services. |
Subsequent Events
Subsequent Events | 12 Months Ended |
Dec. 31, 2022 | |
Subsequent Events [Abstract] | |
SUBSEQUENT EVENTS | SUBSEQUENT EVENTS On January 6, 2023 (the “Effective Date”), the Company entered into a Collaboration and License Agreement (the “Agreement”) with Genentech, Inc., a member of the Roche Group (“Genentech”). Pursuant to the Agreement, the parties have agreed to initially collaborate on two discovery research programs in oncology, each focused on a designated transcription factor, to discover small-molecule GLP-Tox-ready candidates that modulate transcription factor targets selected by Genentech. Each discovery research program will primarily consist of (i) a mapping phase with the goal of identifying the transcription regulatory network for such designated transcription factor, and (ii) a screening phase having the goal of identifying and characterizing multiple screening hits suitable for nomination as a preclinical development program. The Company will lead discovery and research activities under the discovery research programs and will use its proprietary drug discovery platform, including the small molecule microarray (SMM), for hit finding. Following the completion of initial discovery and research activities, Genentech will have the exclusive right to pursue further preclinical and clinical development and commercialization of compounds identified in the discovery research programs and designated by Genentech (each, a “Hit Program”). Pursuant to the Agreement, the Company received an upfront payment of $20.0 million from Genentech. In addition, the Company is eligible for additional milestone payments upon achievement of certain preclinical, clinical and regulatory (including first-sale) milestones, totaling up to $177 million for the first development candidate per Hit Program, and is eligible to receive net sales milestones of up to $100 million for the first licensed product per Hit Program. The Company is also eligible to receive tiered royalties in the low- to high-single digits on any products that are commercialized by Genentech as a result of the collaboration. The term of the discovery research programs under the Agreement will be up to 24 months, which may be extended by six months at the Company’s option subject to satisfying certain conditions. Unless earlier terminated, the Agreement will remain in effect for each product licensed under the Agreement until expiration of the royalty term for such licensed product. Genentech has the right to terminate this Agreement in its entirety, or with respect to a particular discovery research program or Hit Program, in its sole discretion, at any time by providing 60 days’ advance written notice to the Company. Each party may also terminate the Agreement upon the other party’s material breach that remains uncured for 90 days (or 45 days in the event of nonpayment), or in the event of certain insolvency events involving the other party. |
Significant Accounting Polici_2
Significant Accounting Policies, Estimates and Judgments (Policies) | 12 Months Ended |
Dec. 31, 2022 | |
Accounting Policies [Abstract] | |
Basis of Presentation | Basis of Presentation The accompanying financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (SEC) and accounting principles generally accepted in the United States of America (GAAP). |
Use of Estimates | Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Significant estimates and assumptions reflected in these financial statements include, but are not limited to, the accrual of research and development expenses, the fair value of investments, income tax uncertainties, the valuation of equity instruments and the incremental borrowing rate for determining the operating lease assets and liabilities. Estimates are periodically reviewed in light of changes in circumstances, facts and experience. Actual results could differ from the Company’s estimates. |
Research and Development Expenses | Research and Development Expenses Research and development (R&D) expenses consist primarily of personnel costs, including salaries, benefits and stock-based compensation, discovery and development research performed by contract research organizations (CROs), investigator grants, materials and supplies, licenses and fees and overhead allocations consisting of various support and facility-related costs. The Company expenses R&D costs as the services are performed or the goods are received. CRO costs are a significant component of R&D expenses. The Company monitors levels of performance under each significant contract through communications with its CROs. The Company accrues costs for discovery research and development performed by CROs over the service periods specified in the contracts and adjusts its estimates, if required, based upon its ongoing review of the level of effort and costs actually incurred by the CROs. All of the Company’s material CRO contracts are terminable by the Company upon written notice and it is generally only liable for actual services completed by the CRO and certain non-cancellable expenses incurred at any point of termination. |
Cash and Cash Equivalents and Restricted Cash | Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Restricted Cash The Company has deposited cash of $2.0 million as of December 31, 2022 and 2021 to secure a letter of credit in connection with the lease of the Cambridge facility (see Note 13). |
Concentration of Credit Risk and Other Risks and Uncertainties | Concentration of Credit Risk and Other Risks and Uncertainties Financial instruments, which potentially subject the Company to significant concentrations of credit risk, consist primarily of cash and cash equivalents and investments. The primary objectives for the Company’s investment portfolio are the preservation of capital and the maintenance of liquidity. The Company does not enter into any investment transaction for trading or speculative purposes. The Company’s investment policy limits investments to certain types of instruments such as certificates of deposit, money market instruments, obligations issued by the U.S. government and U.S. government agencies as well as corporate debt securities, and places restrictions on maturities and concentration by type and issuer. The Company maintains cash balances in excess of amounts insured by the FDIC and concentrated within a limited number of financial institutions. The accounts are monitored by management and management believes that the financial institutions are financially sound, and, accordingly, minimal credit risk exists with respect to these financial institutions. As of December 31, 2022 and 2021, the Company has not experienced any credit losses in such accounts or investments. |
Investments | Investments Investments are available-for-sale and are carried at estimated fair value. The Company’s valuations of available-for-sale securities are generally derived from independent pricing services based upon quoted prices in active markets for similar securities, with prices adjusted for yield and number of days to maturity, or based on industry models using data inputs, such as interest rates and prices that can be directly observed or corroborated in active markets. Management determines the appropriate classification of its investments in debt securities at the time of purchase. Investments with original maturities beyond three months at the date of purchase and which mature at, or less than 12 months from, the balance sheet date are classified as short-term investments. Unrealized gains and losses are excluded from earnings and are reported as components of comprehensive loss. The Company periodically evaluates whether declines in fair values of its available-for-sale securities below their book value are other-than-temporary. This evaluation consists of several qualitative and quantitative factors regarding the severity and duration of the unrealized loss as well as the Company’s ability and intent to hold the available-for-sale security until a forecasted recovery occurs. Additionally, the Company assesses whether it has plans to sell the security or whether it is more likely than not that it will be required to sell any available-for-sale security before recovery of its amortized cost basis. Realized gains and losses and declines in fair value judged to be other than temporary, if any, on available-for-sale securities are included in interest and other income, net. Interest income on investments is included in interest and other income, net on the Company’s statements of operations and comprehensive loss. |
Fair Value Measurement | Fair Value Measurement Assets and liabilities recorded at fair value on a recurring basis in the balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows: Level 1—Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2—Inputs (other than quoted prices included in Level 1) are either directly or indirectly observable for the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3— Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value estimates are made at a discrete point in time based on relevant market information and information about the financial instruments. Fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates. As of December 31, 2022 and 2021, the Company recorded financial assets requiring fair value measurement. The financial assets include cash equivalents and investments. There were no financial liabilities requiring fair value measurement as of December 31, 2022 and 2021. |
Property and Equipment, Net | Property and Equipment, Net Property and equipment is stated at cost less accumulated depreciation and amortization. Depreciation and amortization are recognized using the straight-line method over the estimated useful lives of the respective assets . Leasehold improvements are amortized over the lesser of their useful lives or the remaining life of the lease. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation and amortization are removed from the balance sheet and the resulting gain or loss is reflected in the statements of operations and comprehensive loss in the period realized . Repairs and maintenance costs are expensed as incurred. Estimated useful lives in years are generally as follows: Description Estimated Useful Life Lab equipment 3 to 7 years Leasehold improvements Shorter of useful life or lease term Furniture and fixtures 5 to 7 years Computer equipment 3 years |
Deferred Offering Costs | |
Leases | Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets, current portion of operating lease liabilities, and noncurrent operating lease liabilities on the Company’s balance sheet. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments and initial direct costs incurred, net of lease incentives. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company elected to exclude from its balance sheets recognition of leases having a term of 12 months or less (short-term leases) and elected to not separate lease components and non-lease components for its long-term real-estate leases. |
Impairment of Long-Lived Assets | Impairment of Long-Lived Assets Long-lived assets, including property and equipment, are reviewed for impairment whenever facts or circumstances either internally or externally may suggest that the carrying value of an asset or asset group may not be recoverable. Should there be an indication of impairment, the Company tests for recoverability by comparing the estimated undiscounted future cash flows expected to result from the use of the asset or asset group and its eventual disposition to the carrying amount of the asset or asset group. Any excess of the carrying value of the asset or asset group over its estimated fair value is recognized as an impairment loss. |
Stock-Based Compensation | Stock-Based Compensation The Company has an equity incentive plan under which various types of equity-based awards are granted, including stock options, restricted stock awards (RSAs), and restricted stock units (RSUs). The Company measures stock-based awards granted to employees and nonemployees based on the fair value on the date of the grant and recognizes stock-based compensation expense of those awards over the requisite service period, which is generally the vesting period of the respective award. The Company calculates the fair value measurement of stock options using the Black-Scholes option-pricing model. Forfeitures are accounted for as |
Income Taxes | Income Taxes The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. Under this method, deferred tax assets and liabilities are determined based on differences between the financial statement carrying amounts and the tax bases of the assets and liabilities using the enacted tax rates in effect in the years in which the differences are expected to reverse. A valuation allowance against deferred tax assets is recorded if, based on the weight of the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company accounts for uncertainty in income taxes recognized in the financial statements by applying a two-step process to determine the amount of tax benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the taxing authorities. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to recognize in the financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement. The provision for income taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, that are considered appropriate as well as the related net interest and penalties. |
Comprehensive Loss | Comprehensive Loss Comprehensive loss includes net loss as well as other changes in stockholders’ equity (deficit) that result from transactions and economic events other than those with stockholders. For the years ended December 31, 2022 and 2021, other comprehensive loss consisted of unrealized gains and losses from available-for-sale securities. |
Net Loss Per Share | Net Loss Per Share Basic net loss per share is computed using the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed using the sum of the weighted-average number of shares of common stock outstanding during the period and the effect of dilutive securities. In periods in which the Company reports a net loss, diluted net loss per share is the same as basic net loss per share, since dilutive shares of common stock are not assumed to have been issued if their effect on net loss per share is anti-dilutive. |
Recently Adopted Accounting Pronouncements Not Yet Adopted | Recent Accounting Pronouncements In May 2021, the FASB issued ASU No. 2021-04, Earnings Per Share (Topic 260), Debt—Modifications and Extinguishments (Subtopic 470-50), Compensation—Stock Compensation (Topic 718), and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options (a consensus of the FASB Emerging Issues Task Force) , which clarifies and reduces diversity in accounting for modifications or exchanges of freestanding equity-classified written call options (for example, warrants) that remain equity classified after modification or exchange. This guidance was effective for the Company in the first quarter of 2022. The effect on the Company’s financial statements and related disclosures was not material. The Company continues to monitor new accounting pronouncements issued by the FASB and does not believe any accounting pronouncements issued through the date of this report will have a material impact on the Company's consolidated financial statements. |
Significant Accounting Polici_3
Significant Accounting Policies, Estimates and Judgments (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Accounting Policies [Abstract] | |
Property, Plant and Equipment | Estimated useful lives in years are generally as follows: Description Estimated Useful Life Lab equipment 3 to 7 years Leasehold improvements Shorter of useful life or lease term Furniture and fixtures 5 to 7 years Computer equipment 3 years Property and equipment, net consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Property and equipment: Lab equipment $ 8,475 $ 8,164 Leasehold improvements 9,348 9,335 Furniture and fixtures 619 596 Computer equipment 58 44 Total property and equipment 18,500 18,139 Less: Accumulated depreciation and amortization (5,515) (3,259) Total property and equipment, net $ 12,985 $ 14,880 |
Fair Value Measurements (Tables
Fair Value Measurements (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Fair Value Disclosures [Abstract] | |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | Financial assets and liabilities subject to fair value measurements on a recurring basis and the level of inputs used in such measurements by major security type as of December 31, 2022 and 2021 were as follows: December 31, 2022 Level 1 Level 2 Level 3 Fair Value (in thousands) Financial Assets: Money market funds $ 49,003 $ — $ — $ 49,003 Certificates of deposit 490 — — 490 Commercial paper — 1,667 1,667 Corporate bonds — 30,657 — 30,657 U.S. agency securities — 13,000 — 13,000 U.S. treasury securities 138,734 — — 138,734 Total financial assets $ 188,227 $ 45,324 $ — $ 233,551 December 31, 2021 Level 1 Level 2 Level 3 Fair Value (in thousands) Financial Assets: Money market funds $ 188,923 $ — $ — $ 188,923 Corporate bonds — 63,620 — 63,620 U.S. treasury securities 79,394 — — 79,394 Total financial assets $ 268,317 $ 63,620 $ — $ 331,937 |
Investments (Tables)
Investments (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Investments, Debt and Equity Securities [Abstract] | |
Investments Classified by Contractual Maturity Date | The fair value and amortized cost of available-for-sale securities by major security type as of December 31, 2022 and 2021 were as follows: December 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Money market funds $ 49,003 $ — $ — $ 49,003 Certificates of deposit 490 — — 490 Commercial paper 1,667 — — 1,667 Corporate bonds 30,683 3 (29) 30,657 U.S. agency securities 13,024 — (24) 13,000 U.S. treasury securities 139,477 4 (747) 138,734 Total cash equivalents and investments $ 234,344 $ 7 $ (800) $ 233,551 December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) Money market funds $ 188,923 $ — $ — $ 188,923 Corporate bonds 63,647 2 (29) 63,620 U.S. treasury securities 79,406 — (12) 79,394 Total cash equivalents and investments $ 331,976 $ 2 $ (41) $ 331,937 Marketable securities that had been in unrealized loss positions as of December 31, 2022 and 2021 were in an unrealized loss position for less than twelve months. These available-for-sale debt securities were classified on the Company’s balance sheets as of December 31, 2022 and 2021 as: Fair Value December 31, 2022 2021 (in thousands) Cash equivalents $ 61,577 $ 190,698 Short-term investments 162,212 141,239 Long-term investments 9,762 — Total cash equivalents and investments $ 233,551 $ 331,937 The fair values of available-for-sale securities by contractual maturity as of December 31, 2022 and 2021 were as follows: December 31, 2022 2021 (in thousands) Due in 1 year or less $ 174,786 $ 143,014 Due in 1 to 2 years 9,762 — Total $ 184,548 $ 143,014 |
Prepaid Expenses And Other Cu_2
Prepaid Expenses And Other Current Assets (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | |
Schedule of Prepaid Expenses and Other Assets | Prepaid expenses and other current assets consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Accrued interest on short-term available-for-sale securities $ 572 $ 816 Prepaid equipment service contracts 289 360 Prepaid external research and development and outside services 2,276 3,074 Prepaid software 905 624 Prepaid insurance 1,630 2,644 Other prepaid expenses 434 527 Total prepaid expenses and other current assets $ 6,106 $ 8,045 |
Property, Plant, and Equipment
Property, Plant, and Equipment (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Property, Plant and Equipment [Abstract] | |
Property, Plant and Equipment | Estimated useful lives in years are generally as follows: Description Estimated Useful Life Lab equipment 3 to 7 years Leasehold improvements Shorter of useful life or lease term Furniture and fixtures 5 to 7 years Computer equipment 3 years Property and equipment, net consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Property and equipment: Lab equipment $ 8,475 $ 8,164 Leasehold improvements 9,348 9,335 Furniture and fixtures 619 596 Computer equipment 58 44 Total property and equipment 18,500 18,139 Less: Accumulated depreciation and amortization (5,515) (3,259) Total property and equipment, net $ 12,985 $ 14,880 |
Accrued Expenses And Current _2
Accrued Expenses And Current Portion Of Other Liabilities (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Payables and Accruals [Abstract] | |
Schedule of Accrued Liabilities | Accrued expenses consisted of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Accrued compensation $ 4,277 $ 4,570 External research and development 7,694 2,655 Accrued outside services 945 1,598 Accrued taxes 40 — Other accrued expenses 7 240 Total accrued expenses $ 12,963 $ 9,063 |
Other Current Liabilities | Current portion of other liabilities consist of the following as of December 31, 2022 and 2021: December 31, 2022 2021 (in thousands) Current portion of unvested early exercised share liability 891 1,364 ESPP withholdings 238 92 Total current portion of other liabilities $ 1,129 $ 1,456 |
Stock-Based Compensation (Table
Stock-Based Compensation (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Share-Based Payment Arrangement [Abstract] | |
Schedule of Option-pricing Model Assumptions | The Black-Scholes option-pricing model assumptions that the Company used to determine the grant-date fair value of stock options for the years ended December 31, 2022 and 2021 were as follows, presented on a weighted-average basis: Year Ended December 31, 2022 2021 Fair value of common stock per share $ 6.48 $ 25.99 Expected term (in years) 5.91 6.01 Expected volatility 78.21% 85.26% Risk-free interest rate 2.28% 0.90% Expected dividend —% —% |
Stock Option Activity | Stock option activity under the 2020 Plan as of December 31, 2022 is summarized as follows: Number of Options Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Balance at December 31, 2021 6,590,400 $ 14.33 Granted 2,730,338 6.48 Forfeited (1,192,074) 18.54 Exercised (673,999) 2.72 Balance at December 31, 2022 7,454,665 $ 11.83 7.69 $ 54 Exercisable at December 31, 2022 3,394,398 $ 11.94 7.38 $ 53 Unvested and expected to vest at December 31, 2022 4,060,267 $ 11.75 7.94 $ 1 |
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions | The fair values of the rights granted under the ESPP were calculated using the following assumptions: Year Ended December 31, 2022 2021 Expected term (in years) 0.49 - 2.00 0.50 - 2.00 Expected volatility 56.55% - 87.15% 71.67% - 94.85% Risk-free interest rate 0.22% - 2.84% 0.05% - 0.25% Dividend yield —% —% |
Schedule of Nonvested Share Activity | Restricted stock awards and units as of December 31, 2022 are summarized as follows: Number of Restricted Stock Weighted-Average Grant Date Fair Value Weighted-Average Remaining Vesting Life Aggregate Intrinsic Value (in years) (in thousands) Unvested at December 31, 2021 787,719 $ 26.88 Granted - restricted stock units 2,061,081 5.50 Vested and converted to shares (329,345) 27.51 Forfeited (221,710) 11.50 Unvested at December 31, 2022 2,297,745 $ 9.18 1.58 $ 3,722 Vested and expected to vest at December 31, 2022 2,297,745 $ 9.18 1.58 $ 3,722 |
Stock-based Compensation, Classified in Statements of Operations | For the years ended December 31, 2022 and 2021 total stock-based compensation related to stock options was classified in the Company’s statements of operations and comprehensive loss as follows: Year Ended December 31, 2022 2021 (in thousands) Research and development expenses $ 8,464 $ 7,753 General and administrative expenses 10,414 8,406 Total stock-based compensation expense $ 18,878 $ 16,159 Total stock-based compensation expense was classified in the Company’s statements of operations and comprehensive loss for the years ended December 31, 2022 and 2021 as follows for stock options, RSAs, RSUs, and ESPP: Year Ended December 31, 2022 2021 (in thousands) Research and development expenses $ 14,974 $ 12,961 General and administrative expenses 16,171 13,250 Total stock-based compensation expense $ 31,145 $ 26,211 |
Income Taxes (Tables)
Income Taxes (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Income Tax Disclosure [Abstract] | |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliation of the income tax expense calculated at the statutory rate to our zero expense for income taxes for the years ended December 31, 2022 and 2021 were as follows: Year Ended December 31, 2022 2021 (in thousands) Tax benefit at federal statutory rate $ (27,973) $ (31,726) State taxes (5,017) (7,138) Research tax credits (15,012) (597) Change in valuation allowance 42,664 38,846 Stock based compensation 5,181 1,212 Other 157 (597) Expense/(Benefit) for income taxes $ — $ — |
Schedule of Deferred Taxes | Significant components of the Company’s deferred tax assets and liabilities are as follows: Year Ended December 31, 2022 2021 (in thousands) Deferred tax assets: Lease liabilities $ 7,948 $ 8,750 Stock-based compensation 4,755 2,777 Accrued compensation 1,093 1,320 Net operating loss carryforwards 58,628 52,052 Tax credit carryforwards 15,963 1,296 Capitalized Research and Development Cost 18,857 — Other 17 — Total deferred tax assets 107,261 66,195 Valuation allowance (100,656) (58,713) Net deferred tax assets 6,605 7,482 Deferred tax liabilities: Right-of-use assets (6,316) (6,973) Fixed assets and intangibles (289) (509) Total deferred tax liabilities (6,605) (7,482) Net deferred tax assets $ — $ — |
Schedule of Net Operating Loss and Research Credit Carryforwards | The following table sets forth the Company’s federal and state net operating loss and research credit carryforwards as of December 31, 2022: Amount Expiration (in thousands) Net operating losses, federal $ 229,617 Indefinite Net operating losses, federal $ 601 2037 Net operating losses, state $ 162,694 2037-2042 Tax credits, federal $ 13,775 2037-2042 Tax credits, state 6,358 2037 |
Schedule of Unrecognized Tax Benefits Roll Forward | The Company applies the provisions of ASC Topic 740 to account for uncertain income tax positions. A reconciliation of the beginning and ending amount of unrecognized tax benefits were as follows: Year Ended December 31, 2022 2021 (in thousands) Balance at beginning of the year $ 246 $ 141 Additions based on tax positions related to the current year 1,993 105 Additions to tax positions of prior years 796 — Balance at the end of the year $ 3,035 $ 246 |
Summary of Valuation Allowance | The following table shows the change in the deferred tax valuation as follows: Year Ended December 31, 2022 2021 (in thousands) Beginning Balance, January 1 $ 58,713 $ 20,797 Change charged to expense/(income) $ 41,943 $ 37,916 Ending Balance, December 31 $ 100,656 $ 58,713 |
Net Loss Per Share (Tables)
Net Loss Per Share (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Earnings Per Share [Abstract] | |
Schedule of Earnings Per Share, Basic and Diluted | The following table summarizes the computation of basic and diluted net loss per share of the Company for the years ended December 31, 2022 and 2021: Year Ended December 31, 2022 2021 (in thousands, except share and per share amounts) Net loss $ (133,204) $ (151,078) Weighted-average common stock outstanding, basic and diluted 56,201,398 54,753,599 Net loss per share, basic and diluted $ (2.37) $ (2.76) |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The Company excluded the following potential shares of common stock, presented based on amounts outstanding at each stated period end, from the computation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect: Year Ended December 31, 2022 2021 Stock options to purchase common stock 7,150,339 5,802,435 Early exercised stock options subject to future vesting 304,326 787,965 Restricted stock awards subject to future vesting 54,297 88,589 Restricted stock units subject to future vesting 2,243,448 699,129 Total 9,752,410 7,378,118 |
Leases (Tables)
Leases (Tables) | 12 Months Ended |
Dec. 31, 2022 | |
Leases [Abstract] | |
Assets and Liabilities, Operating Leases, Lessee | The following table summarizes the presentation of the Company’s operating leases in its balance sheets as of December 31, 2022 and 2021: Balance Sheet Caption December 31, 2022 2021 (in thousands) Assets: Operating lease assets $ 24,707 $ 26,904 Liabilities: Current portion of operating lease liabilities $ 2,347 $ 2,109 Noncurrent operating lease liabilities 28,744 31,653 Total operating lease liabilities $ 31,091 $ 33,762 |
Summary of Lease Costs | The following table summarizes the effect of operating lease costs in the Company’s statements of operations and comprehensive loss for the years ended December 31, 2022 and 2021 : Statement of Operations and Comprehensive Loss Caption Year Ended December 31, 2022 2021 (in thousands) Research and development $ 3,068 $ 3,308 General and administrative 2,043 2,015 Total operating lease cost $ 5,111 $ 5,323 |
Schedule of Maturities on Lease Liabilities | The undiscounted future non-cancellable lease payments under the Company's operating leases as of December 31, 2022 for the next five years and thereafter is expected to be as follows: Period Ending December 31, Amount (in thousands) 2023 $ 5,130 2024 5,749 2025 5,921 2026 5,405 2027 and thereafter 21,298 Total undiscounted lease payments 43,503 Less: Present value adjustment (12,412) Present value of operating lease liabilities $ 31,091 |
Nature of Operations and Basi_2
Nature of Operations and Basis of Presentation (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended | |
Oct. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) segment | Dec. 31, 2021 USD ($) | |
Subsidiary, Sale of Stock [Line Items] | |||
Number of operating segments | segment | 1 | ||
Cash, cash equivalents, and short-term investments | $ 247,900 | ||
Cumulative net operating losses | $ (396,188) | $ (262,984) | |
IPO | |||
Subsidiary, Sale of Stock [Line Items] | |||
Shares issued (in shares) | shares | 15,131,579 | ||
Shares issued, price per share (in dollars per share) | $ / shares | $ 19 | ||
Net proceeds from stock offering | $ 263,700 | ||
Payments of underwriting discounts and commissions | 20,100 | ||
Payments of offering costs | $ 3,700 | ||
Convertible preferred stock, shares outstanding (in shares) | shares | 0 | ||
IPO | Common Stock | |||
Subsidiary, Sale of Stock [Line Items] | |||
Shares issued upon conversion of convertible notes (in shares) | shares | 22,687,625 | ||
Over-Allotment Option | |||
Subsidiary, Sale of Stock [Line Items] | |||
Shares issued (in shares) | shares | 1,973,684 |
Significant Accounting Polici_4
Significant Accounting Policies, Estimates and Judgments - Restricted Cash (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Accounting Policies [Abstract] | ||
Restricted cash | $ 2,026 | $ 2,026 |
Significant Accounting Polici_5
Significant Accounting Policies, Estimates and Judgments - Property, Plant and Equipment (Details) | 12 Months Ended |
Dec. 31, 2022 | |
Lab equipment | Minimum | |
Property, Plant and Equipment [Line Items] | |
Useful life | 3 years |
Lab equipment | Maximum | |
Property, Plant and Equipment [Line Items] | |
Useful life | 7 years |
Furniture and fixtures | Minimum | |
Property, Plant and Equipment [Line Items] | |
Useful life | 5 years |
Furniture and fixtures | Maximum | |
Property, Plant and Equipment [Line Items] | |
Useful life | 7 years |
Computer equipment | |
Property, Plant and Equipment [Line Items] | |
Useful life | 3 years |
Fair Value Measurements (Detail
Fair Value Measurements (Details) - Fair Value, Recurring - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Total financial assets | $ 233,551 | $ 331,937 |
Money market funds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Money market funds | 49,003 | 188,923 |
Certificates of deposit | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 490 | |
Commercial paper | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 1,667 | |
Corporate bonds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 30,657 | 63,620 |
U.S. agency securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 13,000 | |
U.S. treasury securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 138,734 | 79,394 |
Level 1 | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Total financial assets | 188,227 | 268,317 |
Level 1 | Money market funds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Money market funds | 49,003 | 188,923 |
Level 1 | Certificates of deposit | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 490 | |
Level 1 | Commercial paper | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | |
Level 1 | Corporate bonds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | 0 |
Level 1 | U.S. agency securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | |
Level 1 | U.S. treasury securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 138,734 | 79,394 |
Level 2 | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Total financial assets | 45,324 | 63,620 |
Level 2 | Money market funds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Money market funds | 0 | 0 |
Level 2 | Certificates of deposit | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | |
Level 2 | Commercial paper | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 1,667 | |
Level 2 | Corporate bonds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 30,657 | 63,620 |
Level 2 | U.S. agency securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 13,000 | |
Level 2 | U.S. treasury securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | 0 |
Level 3 | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Total financial assets | 0 | 0 |
Level 3 | Money market funds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Money market funds | 0 | 0 |
Level 3 | Certificates of deposit | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | |
Level 3 | Commercial paper | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | ||
Level 3 | Corporate bonds | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | 0 |
Level 3 | U.S. agency securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | 0 | |
Level 3 | U.S. treasury securities | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Investments, fair value | $ 0 | $ 0 |
Investments - Fair Value and Am
Investments - Fair Value and Amortized Cost (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Schedule of Held-to-maturity Securities [Line Items] | ||
Money market funds, amortized cost | $ 61,577 | $ 190,698 |
Fair Value | 184,548 | 143,014 |
Total cash equivalents and investments, amortized cost | 234,344 | 331,976 |
Total cash equivalents and investments, unrealized gains | 7 | 2 |
Total cash equivalents and investments, unrealized losses | (800) | (41) |
Total cash equivalents and investments, fair value | 233,551 | 331,937 |
Money market funds | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Money market funds, amortized cost | 49,003 | 188,923 |
Certificates of deposit | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Amortized Cost | 490 | |
Unrealized Gains | 0 | |
Unrealized Losses | 0 | |
Fair Value | 490 | |
Commercial paper | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Amortized Cost | 1,667 | |
Unrealized Gains | 0 | |
Unrealized Losses | 0 | |
Fair Value | 1,667 | |
Corporate bonds | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Amortized Cost | 30,683 | 63,647 |
Unrealized Gains | 3 | 2 |
Unrealized Losses | (29) | (29) |
Fair Value | 30,657 | 63,620 |
U.S. agency securities | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Amortized Cost | 13,024 | |
Unrealized Gains | 0 | |
Unrealized Losses | (24) | |
Fair Value | 13,000 | |
U.S. treasury securities | ||
Schedule of Held-to-maturity Securities [Line Items] | ||
Amortized Cost | 139,477 | 79,406 |
Unrealized Gains | 4 | 0 |
Unrealized Losses | (747) | (12) |
Fair Value | $ 138,734 | $ 79,394 |
Investments - Balance Sheet (De
Investments - Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Investments, Debt and Equity Securities [Abstract] | ||
Cash equivalents | $ 61,577 | $ 190,698 |
Short-term investments | 162,212 | 141,239 |
Long-term investments | 9,762 | 0 |
Total cash equivalents and investments | $ 233,551 | $ 331,937 |
Investments - Contractual Matur
Investments - Contractual Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Investments, Debt and Equity Securities [Abstract] | ||
Due in 1 year or less | $ 174,786 | $ 143,014 |
Due in 1 to 2 years | 9,762 | 0 |
Total | $ 184,548 | $ 143,014 |
Prepaid Expenses And Other Cu_3
Prepaid Expenses And Other Current Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | ||
Accrued interest on short-term available-for-sale securities | $ 572 | $ 816 |
Prepaid equipment service contracts | 289 | 360 |
Prepaid external research and development and outside services | 2,276 | 3,074 |
Prepaid software | 905 | 624 |
Prepaid insurance | 1,630 | 2,644 |
Other prepaid expenses | 434 | 527 |
Prepaid expenses and other current assets | $ 6,106 | $ 8,045 |
Property, Plant, and Equipmen_2
Property, Plant, and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | $ 18,500 | $ 18,139 |
Less: Accumulated depreciation and amortization | (5,515) | (3,259) |
Total property and equipment, net | 12,985 | 14,880 |
Depreciation and amortization | 2,266 | 1,977 |
Lab equipment | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 8,475 | 8,164 |
Leasehold improvements | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 9,348 | 9,335 |
Furniture and fixtures | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | 619 | 596 |
Computer equipment | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment, gross | $ 58 | $ 44 |
Accrued Expenses And Current _3
Accrued Expenses And Current Portion Of Other Liabilities - Accrued Expenses (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Payables and Accruals [Abstract] | ||
Accrued compensation | $ 4,277 | $ 4,570 |
External research and development | 7,694 | 2,655 |
Accrued outside services | 945 | 1,598 |
Accrued taxes | 40 | 0 |
Other accrued expenses | 7 | 240 |
Total accrued expenses | $ 12,963 | $ 9,063 |
Accrued Expenses And Current _4
Accrued Expenses And Current Portion Of Other Liabilities - Current Other Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Payables and Accruals [Abstract] | ||
Current portion of unvested early exercised share liability | $ 891 | $ 1,364 |
ESPP withholdings | 238 | 92 |
Total current portion of other liabilities | $ 1,129 | $ 1,456 |
Stockholders' Equity (Deficit)
Stockholders' Equity (Deficit) (Details) | Dec. 31, 2022 $ / shares shares | Dec. 31, 2021 $ / shares shares | Oct. 14, 2020 vote $ / shares shares |
Equity [Abstract] | |||
Preferred stock, shares authorized (in shares) | 10,000,000 | 10,000,000 | 10,000,000 |
Preferred stock, par value (in dollars per share) | $ / shares | $ 0.001 | $ 0.001 | $ 0.001 |
Preferred stock, shares issued (in shares) | 0 | 0 | |
Preferred stock, shares outstanding (in shares) | 0 | 0 | |
Common stock, shares authorized (in shares) | 200,000,000 | 200,000,000 | |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 | $ 0.001 | $ 0.001 |
Common stock, shares issued (in shares) | 56,967,436 | 55,703,327 | |
Common stock, shares outstanding (in shares) | 56,967,436 | 55,703,327 | |
Common stock, voting rights, number of votes per common share | vote | 1 |
Stock-Based Compensation - Narr
Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended | |
Oct. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Weighted-average grant-date fair value, options granted (in dollars per share) | $ 5.57 | $ 18.52 | |
Stock options exercised, intrinsic value | $ 2 | $ 23.8 | |
Stock options, unrecognized cost | $ 35.4 | $ 49.9 | |
2020 Equity Incentive Plan | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Number of shares that may be issued (in shares) | 11,938,152 | 17,568,821 | |
Expiration period | 10 years | 10 years | |
Shares that may be issued, percent increase as total of common stock outstanding | 5% | ||
Number of shares reserved for future issuance (in shares) | 4,098,939 | 4,647,580 | |
Exercise price per share of stock options as percent of fair market value of common stock | 100% | ||
2020 Equity Incentive Plan | Minimum | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting period | 4 years | ||
2020 Equity Incentive Plan | Maximum | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting period | 10 years | ||
Stock options | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Expected dividend | 0% | 0% | |
Stock options recognized, weighted average period | 2 years 3 months | 2 years 11 months 4 days |
Stock-Based Compensation - Opti
Stock-Based Compensation - Option-pricing Model Assumptions (Details) - Stock options - $ / shares | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Fair value of common stock per share (dollars per share) | $ 6.48 | $ 25.99 |
Expected term (in years) | 5 years 10 months 28 days | 6 years 3 days |
Expected volatility | 78.21% | 85.26% |
Risk-free interest rate | 2.28% | 0.90% |
Expected dividend | 0% | 0% |
Stock-Based Compensation - Stoc
Stock-Based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands | 12 Months Ended |
Dec. 31, 2022 USD ($) $ / shares shares | |
Number of Options | |
Beginning Balance (in shares) | shares | 6,590,400 |
Granted (in shares) | shares | 2,730,338 |
Forfeited (in shares) | shares | (1,192,074) |
Exercised (in shares) | shares | (673,999) |
Ending Balance (in shares) | shares | 7,454,665 |
Weighted-Average Exercise Price | |
Beginning Balance (dollars per share) | $ / shares | $ 14.33 |
Granted (dollars per share) | $ / shares | 6.48 |
Forfeited (dollars per share) | $ / shares | 18.54 |
Exercised (dollars per share) | $ / shares | 2.72 |
Ending Balance (dollars per share) | $ / shares | $ 11.83 |
Stock Option Activity, Additional Disclosures [Abstract] | |
Balance, Weighted-Average Remaining Contractual Term | 7 years 8 months 8 days |
Balance, Aggregate Intrinsic Value | $ | $ 54 |
Exercisable (in shares) | shares | 3,394,398 |
Exercisable (in dollars per share) | $ / shares | $ 11.94 |
Exercisable, Weighted-Average Remaining Contractual Term | 7 years 4 months 17 days |
Exercisable, Aggregate Intrinsic Value | $ | $ 53 |
Unvested and expected to vest (in shares) | shares | 4,060,267 |
Unvested and expected to vest (in dollars per share) | $ / shares | $ 11.75 |
Unvested and expected to vest, Weighted-Average Remaining Contractual Term | 7 years 11 months 8 days |
Unvested and expected to vest, Aggregate Intrinsic Value | $ | $ 1 |
Stock-Based Compensation - St_2
Stock-Based Compensation - Stock Based Compensation - Stock Options (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 31,145 | $ 26,211 |
Stock options | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 18,878 | 16,159 |
Research and development expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 14,974 | 12,961 |
Research and development expenses | Stock options | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 8,464 | 7,753 |
General and administrative expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 16,171 | 13,250 |
General and administrative expenses | Stock options | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 10,414 | $ 8,406 |
Stock-Based Compensation - ESPP
Stock-Based Compensation - ESPP (Details) $ in Thousands | 1 Months Ended | 12 Months Ended | |||
Jan. 01, 2022 shares | Jan. 01, 2021 shares | Oct. 31, 2020 period shares | Dec. 31, 2022 USD ($) hour shares | Dec. 31, 2021 USD ($) shares | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | $ 31,145 | $ 26,211 | |||
General and administrative expenses | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | 16,171 | 13,250 | |||
Research and development expenses | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | $ 14,974 | $ 12,961 | |||
The ESPP | Employee stock purchase plan | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Number of shares that may be issued (in shares) | shares | 688,000 | ||||
Number of shares that may be issued, increase percentage | 1% | ||||
Number of shares that may be issued, increase (in shares) | shares | 565,798 | 560,335 | 1,376,000 | ||
Employment eligibility, number of hours employed per week | hour | 20 | ||||
Employee stock purchase plan (in shares) | shares | 260,765 | 95,723 | |||
Exercise price per share of stock options as percent of fair market value of common stock | 85% | ||||
Number of shares reserved for future issuance (in shares) | shares | 1,553,368 | ||||
Expected dividend | 0% | ||||
Fixed contribution rate | 15% | ||||
Stock-based compensation expense | $ 1,400 | $ 1,100 | |||
The ESPP | Employee stock purchase plan | General and administrative expenses | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | 300 | 300 | |||
The ESPP | Employee stock purchase plan | Research and development expenses | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Stock-based compensation expense | $ 1,100 | $ 800 | |||
The ESPP | Employee stock purchase plan | Initial Offering | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Offering period | 27 months | ||||
The ESPP | Employee stock purchase plan | Subsequent Offering | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Offering period | 24 months | ||||
Number of offering periods | period | 4 | ||||
Minimum | The ESPP | Employee stock purchase plan | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Expected term (in years) | 5 months 26 days | 6 months | |||
Expected volatility | 56.55% | 71.67% | |||
Risk-free interest rate | 0.22% | 0.05% | |||
Expected dividend | 0% | ||||
Maximum | The ESPP | Employee stock purchase plan | |||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
Expected term (in years) | 2 years | 2 years | |||
Expected volatility | 87.15% | 94.85% | |||
Risk-free interest rate | 2.84% | 0.25% |
Stock-Based Compensation - Rest
Stock-Based Compensation - Restricted Stock Awards Activity (Details) - Restricted stock $ / shares in Units, $ in Thousands | 12 Months Ended |
Dec. 31, 2022 USD ($) $ / shares shares | |
Number of Restricted Stock | |
Unvested Beginning Balance (in shares) | shares | 787,719 |
Granted - restricted stock awards and units (in shares) | shares | 2,061,081 |
Vested and converted to shares (in shares) | shares | (329,345) |
Forfeited (in shares) | shares | (221,710) |
Unvested Ending Balance (in shares) | shares | 2,297,745 |
Weighted-Average Grant Date Fair Value | |
Unvested Beginning Balance (in dollars per share) | $ / shares | $ 26.88 |
Granted - restricted stock awards and units (in dollars per share) | $ / shares | 5.50 |
Vested and converted to shares (in dollars per share) | $ / shares | 27.51 |
Forfeited (in dollars per share) | $ / shares | 11.50 |
Unvested Ending Balance (in dollars per share) | $ / shares | $ 9.18 |
Restricted Stock, Additional Disclosures | |
Unvested, Weighted Average Remaining Vesting Life | 1 year 6 months 29 days |
Unvested, Aggregate Intrinsic Value | $ | $ 3,722 |
Vested and expected to vest, Outstanding (in shares) | shares | 2,297,745 |
Vested and expected to vest, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | $ 9.18 |
Vested and expected to vest, Weighted Average Remaining Vesting Life | 1 year 6 months 29 days |
Vested and expected to vest, Aggregate Intrinsic Value | $ | $ 3,722 |
Stock-Based Compensation - Re_2
Stock-Based Compensation - Restricted Stock Awards (Details) - USD ($) | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 31,145,000 | $ 26,211,000 |
Research and development expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 14,974,000 | 12,961,000 |
General and administrative expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 16,171,000 | 13,250,000 |
Restricted stock | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Restricted stock awards issued (in shares) | 2,061,081 | |
Unrecognized stock based compensation | $ 200,000 | |
Awards weighted average recognition period | 1 year 6 months 29 days | |
Total grant date fair value for awards vested | $ 100,000 | 200,000 |
Vested (in shares) | 329,345 | |
Restricted stock | Research and development expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 0 | 5,000 |
Restricted stock | General and administrative expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 100,000 | 100,000 |
Restricted Stock Units (RSUs) | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | 11,000,000 | $ 8,500,000 |
Unrecognized stock based compensation | $ 15,700,000 | |
Awards weighted average recognition period | 1 year 3 months 25 days | |
Vested (in shares) | 295,053 | 188,470 |
Restricted Stock Units (RSUs) | Executive Employee | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Restricted stock awards issued (in shares) | 2,061,081 | 347,267 |
Vesting period | 3 years | |
Restricted Stock Units (RSUs) | Research and development expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 5,700,000 | $ 4,100,000 |
Restricted Stock Units (RSUs) | General and administrative expenses | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Stock-based compensation expense | $ 5,300,000 | $ 4,400,000 |
Stock-Based Compensation - Earl
Stock-Based Compensation - Early Exercised Options (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Early exercised stock options (in shares) | 0 | 0 |
Current liabilities related to shares that were subject to repurchase | $ 891 | $ 1,364 |
Current portion of other liabilities | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Current liabilities related to shares that were subject to repurchase | 900 | 1,400 |
Other noncurrent liabilities | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Non-current liabilities related to shares that were subject to repurchase | $ 200 | $ 1,100 |
Income Taxes - Narrative (Detai
Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended | ||
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
Income Tax Disclosure [Abstract] | |||
Income tax expense | $ 0 | $ 0 | $ 0 |
Valuation allowance | (100,656,000) | (58,713,000) | $ (20,797,000) |
Valuation allowance increase | 41,943,000 | 37,916,000 | |
Accrued interest or penalties related to uncertain tax positions | 0 | $ 0 | |
Deferred Expense, Capitalized Research And Development Costs | $ 73,800,000 |
Income Taxes - Reconciliation o
Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) | 12 Months Ended | ||
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | |
Income Tax Disclosure [Abstract] | |||
Tax benefit at federal statutory rate | $ (27,973,000) | $ (31,726,000) | |
State taxes | (5,017,000) | (7,138,000) | |
Research tax credits | (15,012,000) | (597,000) | |
Change in valuation allowance | 42,664,000 | 38,846,000 | |
Stock based compensation | 5,181,000 | 1,212,000 | |
Other | 157,000 | (597,000) | |
Expense/(Benefit) for income taxes | $ 0 | $ 0 | $ 0 |
Income Taxes - Components of Ne
Income Taxes - Components of Net Deferred Tax Asset and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 |
Deferred tax assets: | |||
Lease liabilities | $ 7,948 | $ 8,750 | |
Stock-based compensation | 4,755 | 2,777 | |
Accrued compensation | 1,093 | 1,320 | |
Net operating loss carryforwards | 58,628 | 52,052 | |
Tax credit carryforwards | 15,963 | 1,296 | |
Capitalized Research and Development Cost | 18,857 | 0 | |
Other | 17 | 0 | |
Total deferred tax assets | 107,261 | 66,195 | |
Valuation allowance | (100,656) | (58,713) | $ (20,797) |
Net deferred tax assets | 6,605 | 7,482 | |
Deferred tax liabilities: | |||
Right-of-use assets | (6,316) | (6,973) | |
Fixed assets and intangibles | (289) | (509) | |
Total deferred tax liabilities | (6,605) | (7,482) | |
Net deferred tax assets | $ 0 | $ 0 |
Income Taxes - Net Operating Lo
Income Taxes - Net Operating Loss and Research Credit Carryforwards (Details) $ in Thousands | Dec. 31, 2022 USD ($) |
Federal | Expiring Indefinitely | |
Operating Loss Carryforwards [Line Items] | |
Net operating losses | $ 229,617 |
Federal | Expiring In 2037 | |
Operating Loss Carryforwards [Line Items] | |
Net operating losses | 601 |
Federal | Research Tax Credit Carryforward | |
Operating Loss Carryforwards [Line Items] | |
Tax credits | 13,775 |
State | |
Operating Loss Carryforwards [Line Items] | |
Net operating losses | 162,694 |
State | Research Tax Credit Carryforward | |
Operating Loss Carryforwards [Line Items] | |
Tax credits | $ 6,358 |
Income Taxes - Unrecognized Tax
Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | ||
Balance at beginning of the year | $ 246 | $ 141 |
Additions based on tax positions related to the current year | 1,993 | 105 |
Additions to tax positions of prior years | 796 | 0 |
Balance at the end of the year | $ 3,035 | $ 246 |
Income Taxes - Schedule of Defe
Income Taxes - Schedule of Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Deferred Tax Asset, Valuation Allowance [Roll Forward] | ||
Beginning Balance, January 1 | $ 58,713 | $ 20,797 |
Change charged to expense/(income) | 41,943 | 37,916 |
Ending Balance, December 31 | $ 100,656 | $ 58,713 |
Net Loss Per Share (Details)
Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Earnings Per Share [Abstract] | ||
Net loss | $ (133,204) | $ (151,078) |
Weighted-average shares of common stock, basic (in shares) | 56,201,398 | 54,753,599 |
Weighted-average shares of common stock, diluted (in shares) | 56,201,398 | 54,753,599 |
Net loss per share, basic (in dollars per share) | $ (2.37) | $ (2.76) |
Net loss per share, diluted (in dollars per share) | $ (2.37) | $ (2.76) |
Net Loss Per Share - Antidiluti
Net Loss Per Share - Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 9,752,410 | 7,378,118 |
Stock options to purchase common stock | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 7,150,339 | 5,802,435 |
Early exercised stock options subject to future vesting | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 304,326 | 787,965 |
Restricted stock awards subject to future vesting | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 54,297 | 88,589 |
Restricted stock units subject to future vesting | ||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 2,243,448 | 699,129 |
Commitment and Contingencies -
Commitment and Contingencies - R&D Services Agreement (Details) - Tempus Labs, Inc. - Research And Development Services $ in Millions | 1 Months Ended | 12 Months Ended | |
Oct. 31, 2021 USD ($) service | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | |
Long-term Purchase Commitment [Line Items] | |||
Services contract term | 3 years | ||
Number of primary services | service | 3 | ||
Annual minimum commitment payment in year one | $ 1.5 | ||
Annual minimum commitment payment in year two | 2 | ||
Annual minimum commitment payment in year three | 2.5 | ||
Payments for purchase obligation | $ 1.1 | $ 0 | |
Sales milestone payment | $ 22.4 | ||
Sales milestone payment in shares of common stock, percent threshold | 50% |
Commitment and Contingencies _2
Commitment and Contingencies - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | |
Oct. 31, 2020 | Jul. 31, 2020 | |
Schedule Of Asset Acquisition [Line Items] | ||
Royalty obligation, termination, period from first commercial sale | 10 years | |
Common Stock | IPO | ||
Schedule Of Asset Acquisition [Line Items] | ||
Shares issued upon conversion of convertible notes (in shares) | 22,687,625 | |
2020 Gilead Notes | Common Stock | IPO | ||
Schedule Of Asset Acquisition [Line Items] | ||
Shares issued upon conversion of convertible notes (in shares) | 188,567 | |
Settlement price per share (in dollars per share) | $ 16.15 | |
Asset Purchase Agreement | ||
Schedule Of Asset Acquisition [Line Items] | ||
Sales milestone payment | $ 29 | |
Regulatory milestone payment | 51.3 | |
Aggregate sales milestone payment | 115 | |
Gilead Asset Purchase | ||
Schedule Of Asset Acquisition [Line Items] | ||
Upfront cash payment | 3 | |
Convertible promissory note issued | 3 | |
Payments for reimbursements | $ 0.7 |
Leases - Additional Information
Leases - Additional Information (Details) $ in Thousands | 1 Months Ended | 12 Months Ended | |||
Feb. 28, 2021 USD ($) ft² | Mar. 31, 2020 USD ($) ft² | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jul. 01, 2020 ft² | |
Lessee, Lease, Description [Line Items] | |||||
Operating lease right-of-use assets | $ 24,707 | $ 26,904 | |||
Lease liabilities | 31,091 | 33,762 | |||
Lease payments | 5,700 | 4,400 | |||
301 Binney Street, Cambridge, Massachusetts | |||||
Lessee, Lease, Description [Line Items] | |||||
Lease term | 11 years | ||||
Facility size | ft² | 40,514 | ||||
Annual base rent | $ 4,100 | ||||
Escalating rent payments, percent | 3% | ||||
Letter of credit | 2,000 | ||||
Tenant improvement allowances | $ 3,700 | ||||
Improvement costs incurred, reimbursed by lessor | 3,700 | ||||
Operating lease right-of-use assets | 21,900 | ||||
Lease liabilities | $ 28,000 | ||||
Remaining lease term | 8 years 2 months 12 days | ||||
Incremental borrowing rate | 8.50% | ||||
San Mateo, California. Original Lease | |||||
Lessee, Lease, Description [Line Items] | |||||
Facility size | ft² | 8,075 | ||||
San Mateo, California. February 2021 Lease Agreement | |||||
Lessee, Lease, Description [Line Items] | |||||
Facility size | ft² | 17,340 | ||||
Escalating rent payments, percent | 3% | ||||
Operating lease right-of-use assets | $ 2,800 | 3,300 | |||
Lease liabilities | $ 3,700 | $ 4,100 | |||
Remaining lease term | 3 years 6 months | ||||
Incremental borrowing rate | 11.18% | ||||
Initial annual base rent | $ 1,200 | ||||
Security deposit | $ 59 |
Leases - Summary of Lease Costs
Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Lessee, Lease, Description [Line Items] | ||
Operating lease cost | $ 5,111 | $ 5,323 |
Research and development | ||
Lessee, Lease, Description [Line Items] | ||
Operating lease cost | 3,068 | 3,308 |
General and administrative expenses | ||
Lessee, Lease, Description [Line Items] | ||
Operating lease cost | $ 2,043 | $ 2,015 |
Leases - Supplemental Balance S
Leases - Supplemental Balance Sheet Information - Operating Leases (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Assets: | ||
Operating lease assets | $ 24,707 | $ 26,904 |
Liabilities: | ||
Current portion of operating lease liabilities | 2,347 | 2,109 |
Noncurrent operating lease liabilities | 28,744 | 31,653 |
Total operating lease liabilities | $ 31,091 | $ 33,762 |
Leases - Schedule of Maturities
Leases - Schedule of Maturities on Lease Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 |
Leases [Abstract] | ||
2023 | $ 5,130 | |
2024 | 5,749 | |
2025 | 5,921 | |
2026 | 5,405 | |
2027 and thereafter | 21,298 | |
Total undiscounted lease payments | 43,503 | |
Less: Present value adjustment | (12,412) | |
Present value of operating lease liabilities | $ 31,091 | $ 33,762 |
Related Party Disclosures (Deta
Related Party Disclosures (Details) - Affiliated Entity - USD ($) | 12 Months Ended | |
Dec. 31, 2022 | Dec. 31, 2021 | |
Two River Consulting, LLC | ||
Related Party Transaction [Line Items] | ||
Expenses from transaction with related party | $ 100,000 | $ 300,000 |
Bellco Capital, LLC | ||
Related Party Transaction [Line Items] | ||
Expenses from transaction with related party | $ 25,200 | $ 129,000 |
Subsequent Events (Details)
Subsequent Events (Details) - Subsequent Event $ in Millions | Jan. 06, 2023 USD ($) program |
Subsequent Event [Line Items] | |
Number of discovery research programs | program | 2 |
Genentech, Inc. | |
Subsequent Event [Line Items] | |
Collaboration and license agreement, termination notice period, prior written notice | 60 days |
Collaboration and license agreement, termination notice period, uncured material breach | 90 days |
Collaboration and license agreement, termination notice period, uncured material breach, nonpayment | 45 days |
Genentech, Inc. | |
Subsequent Event [Line Items] | |
Expected timing of satisfaction, extension period | 6 months |
Genentech, Inc. | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-07 | |
Subsequent Event [Line Items] | |
Expected timing of satisfaction, period | 24 months |
Genentech, Inc. | License | |
Subsequent Event [Line Items] | |
Upfront payment | $ 20 |
Maximum aggregate milestone payments | 177 |
Maximum aggregate milestone payments from net sales | $ 100 |