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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) | Total | Common stock | Preferred stock | Additional paid-in capital | Accumulated deficit | Accumulated other comprehensive loss | Treasury stock | Series A-1 Preferred Stock | Series A-1 Preferred Stock Preferred stock | Series B Preferred Stock Preferred stock
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Preferred stock, outstanding (in shares) |  |  |  |  |  |  |  |  |  | 357,000
Beginning balance (in shares) at Dec. 31, 2021 |  | 46,625,000 |  |  |  |  | 3,602,000 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common stock issued upon vesting of restricted stock |  | 264,000 |  |  |  |  |  |  |  |
Common stock issued for ESPP purchases |  | 84,000 |  |  |  |  |  |  |  |
Conversion of preferred stock |  | 4,098,000 |  |  |  |  |  |  |  |
Repurchases of common stock |  |  |  |  |  |  | 1,652,000 |  | 7,000 |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 77,000 |  |  |
Ending balance (in shares) at Sep. 30, 2022 |  | 51,071,000 |  |  |  |  | 5,331,000 |  |  |
Beginning balance at Dec. 31, 2021 |  | $ 4,000 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  | 1,000 |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2022 |  | $ 5,000 |  |  |  |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2021 |  |  |  |  |  |  |  |  | 4,204,000 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 4,204,000 | 357,000
Ending balance (in shares) at Sep. 30, 2022 |  |  |  |  |  |  |  |  | 0 |
Beginning balance (in shares) at Dec. 31, 2021 |  |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  | 7,244 | (7,000) |
Ending balance (in shares) at Sep. 30, 2022 |  |  |  |  |  |  |  |  | 0 |
Beginning balance at Dec. 31, 2021 |  |  |  | $ 960,544,000 | $ (136,590,000) | $ (537,000) | $ (79,035,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Stock-based compensation to employees and directors |  |  |  | 13,390,000 |  |  |  |  |  |
Common stock issued for ESPP purchases |  |  |  | 2,779,000 |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  | 1,043,000 |  |  |  |  |  |
Other |  |  |  | 34,000 |  |  |  |  |  |
Net loss | $ (19,725,000) |  |  |  | (19,725,000) |  |  |  |  |
Dividend issued upon conversion and elimination of preferred stock |  |  |  |  | (1,697,000) |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  | (306,000) |  |  |  |  |
Net other comprehensive income | 12,000 |  |  |  |  | 12,000 |  |  |  |
Repurchases of common and Series A-1 preferred stock |  |  |  |  |  |  | 60,077,000 |  |  |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 3,501,000 |  |  |
Conversion and elimination of preferred stock |  |  |  |  | 306,000 |  | (306,000) |  |  |
Ending balance at Sep. 30, 2022 | 676,645,000 |  |  | 977,790,000 | (158,318,000) | (525,000) | $ (142,307,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Preferred stock, outstanding (in shares) |  |  |  |  |  |  |  |  |  | 0
Beginning balance (in shares) at Jun. 30, 2022 |  | 51,026,000 |  |  |  |  | 5,331,000 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common stock issued upon vesting of restricted stock |  | 3,000 |  |  |  |  |  |  |  |
Common stock issued for ESPP purchases |  | 42,000 |  |  |  |  |  |  |  |
Conversion of preferred stock |  | 0 |  |  |  |  |  |  |  |
Repurchases of common stock |  |  |  |  |  |  | 0 |  | 0 |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 0 |  |  |
Ending balance (in shares) at Sep. 30, 2022 |  | 51,071,000 |  |  |  |  | 5,331,000 |  |  |
Beginning balance at Jun. 30, 2022 |  | $ 5,000 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  | 0 |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2022 |  | $ 5,000 |  |  |  |  |  |  |  |
Beginning balance (in shares) at Jun. 30, 2022 |  |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 0 | 0
Ending balance (in shares) at Sep. 30, 2022 |  |  |  |  |  |  |  |  | 0 |
Beginning balance (in shares) at Jun. 30, 2022 |  |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 0 |
Ending balance (in shares) at Sep. 30, 2022 |  |  |  |  |  |  |  |  | 0 |
Beginning balance at Jun. 30, 2022 |  |  |  | 972,845,000 | (121,323,000) | (529,000) | $ (142,288,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Stock-based compensation to employees and directors |  |  |  | 4,056,000 |  |  |  |  |  |
Common stock issued for ESPP purchases |  |  |  | 889,000 |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  | 0 |  |  |  |  |  |
Other |  |  |  | 0 |  |  |  |  |  |
Net loss | (36,995,000) |  |  |  | (36,995,000) |  |  |  |  |
Dividend issued upon conversion and elimination of preferred stock |  |  |  |  | 0 |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  | 0 |  |  |  |  |
Net other comprehensive income | 4,000 |  |  |  |  | 4,000 |  |  |  |
Repurchases of common and Series A-1 preferred stock |  |  |  |  |  |  | 0 |  |  |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 19,000 |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  | 0 |  |  |
Ending balance at Sep. 30, 2022 | $ 676,645,000 |  |  | 977,790,000 | (158,318,000) | (525,000) | $ (142,307,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  | 45,740,000 |  |  |  |  |  |  |  |
Preferred stock, outstanding (in shares) |  |  |  |  |  |  |  |  | 0 | 0
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none |  |  | $ 0 |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | 44,951,000 |  |  |  |  |  |  |  |  |
Preferred stock, outstanding (in shares) | 0 |  |  |  |  |  |  |  |  | 0
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none | $ 0 |  |  |  |  |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2022 |  | 51,102,000 |  |  |  |  | 6,151,000 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common stock issued upon vesting of restricted stock |  | 365,000 |  |  |  |  |  |  |  |
Common stock issued for ESPP purchases |  | 118,000 |  |  |  |  |  |  |  |
Conversion of preferred stock |  | 0 |  |  |  |  |  |  |  |
Repurchases of common stock |  |  |  |  |  |  | 0 |  | 0 |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 129,000 |  |  |
Ending balance (in shares) at Sep. 30, 2023 |  | 51,585,000 |  |  |  |  | 6,280,000 |  |  |
Beginning balance at Dec. 31, 2022 |  | $ 5,000 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  | 0 |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2023 |  | $ 5,000 |  |  |  |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2022 | 0 |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 0 | 0
Ending balance (in shares) at Sep. 30, 2023 | 0 |  |  |  |  |  |  |  | 0 |
Beginning balance (in shares) at Dec. 31, 2022 |  |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 0 |
Ending balance (in shares) at Sep. 30, 2023 |  |  |  |  |  |  |  |  | 0 |
Beginning balance at Dec. 31, 2022 | $ 645,826,000 |  |  | 982,718,000 | (173,829,000) | (522,000) | $ (162,546,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Stock-based compensation to employees and directors |  |  |  | 17,863,000 |  |  |  |  |  |
Common stock issued for ESPP purchases |  |  |  | 1,913,000 |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  | 0 |  |  |  |  |  |
Other |  |  |  | 0 |  |  |  |  |  |
Net loss | (146,849,000) |  |  |  | (146,849,000) |  |  |  |  |
Dividend issued upon conversion and elimination of preferred stock |  |  |  |  | 0 |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  | 0 |  |  |  |  |
Net other comprehensive income | 12,000 |  |  |  |  | 12,000 |  |  |  |
Repurchases of common and Series A-1 preferred stock |  |  |  |  |  |  | 0 |  |  |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 2,581,000 |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  | 0 |  |  |
Ending balance at Sep. 30, 2023 | $ 516,184,000 |  |  | 1,002,494,000 | (320,678,000) | (510,000) | $ (165,127,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Preferred stock, outstanding (in shares) |  |  |  |  |  |  |  |  |  | 0
Beginning balance (in shares) at Jun. 30, 2023 |  | 51,455,000 |  |  |  |  | 6,253,000 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common stock issued upon vesting of restricted stock |  | 80,000 |  |  |  |  |  |  |  |
Common stock issued for ESPP purchases |  | 50,000 |  |  |  |  |  |  |  |
Conversion of preferred stock |  | 0 |  |  |  |  |  |  |  |
Repurchases of common stock |  |  |  |  |  |  | 0 |  | 0 |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 27,000 |  |  |
Ending balance (in shares) at Sep. 30, 2023 |  | 51,585,000 |  |  |  |  | 6,280,000 |  |  |
Beginning balance at Jun. 30, 2023 |  | $ 5,000 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  | 0 |  |  |  |  |  |  |  |
Ending balance at Sep. 30, 2023 |  | $ 5,000 |  |  |  |  |  |  |  |
Beginning balance (in shares) at Jun. 30, 2023 |  |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 0 | 0
Ending balance (in shares) at Sep. 30, 2023 | 0 |  |  |  |  |  |  |  | 0 |
Beginning balance (in shares) at Jun. 30, 2023 |  |  |  |  |  |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  |  |  | 0 |
Ending balance (in shares) at Sep. 30, 2023 |  |  |  |  |  |  |  |  | 0 |
Beginning balance at Jun. 30, 2023 |  |  |  | 995,904,000 | (257,629,000) | (514,000) | $ (164,600,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Stock-based compensation to employees and directors |  |  |  | 5,798,000 |  |  |  |  |  |
Common stock issued for ESPP purchases |  |  |  | 792,000 |  |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  | 0 |  |  |  |  |  |
Other |  |  |  | 0 |  |  |  |  |  |
Net loss | $ (63,049,000) |  |  |  | (63,049,000) |  |  |  |  |
Dividend issued upon conversion and elimination of preferred stock |  |  |  |  | 0 |  |  |  |  |
Conversion and elimination of preferred stock |  |  |  |  | 0 |  |  |  |  |
Net other comprehensive income | 4,000 |  |  |  |  | 4,000 |  |  |  |
Repurchases of common and Series A-1 preferred stock |  |  |  |  |  |  | 0 |  |  |
Tax withholding upon vesting of employee stock awards |  |  |  |  |  |  | 527,000 |  |  |
Conversion and elimination of preferred stock |  |  |  |  |  |  | 0 |  |  |
Ending balance at Sep. 30, 2023 | $ 516,184,000 |  |  | $ 1,002,494,000 | $ (320,678,000) | $ (510,000) | $ (165,127,000) |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | 45,305,000 | 45,305,000 |  |  |  |  |  |  |  |
Preferred stock, outstanding (in shares) | 0 |  |  |  |  |  |  |  | 0 | 0
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none | $ 0 |  | $ 0 |  |  |  |  |  |  |

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