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Consolidated Statements Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Total | Common Stock | Additional-paid in Capital | Accumulated Other Comprehensive Income | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2021 | $ 130,824 | $ 35 | $ 310,936 | $ (62) | $ (180,085)
Beginning Balance (in shares) at Dec. 31, 2021 |  | 34,611,213 |  |  |
Stock-based compensation expense | 15,425 |  | 15,425 |  |
Purchase of common stock under Employee Stock Purchase Plan | 196 |  | 196 |  |
Purchase of common stock under Employee Stock Purchase Plan (in shares) |  | 76,606 |  |  |
Issuance of common stock, net | 61 |  | 61 |  |
Issuance of common stock, net (in shares) |  | 22,964 |  |  |
Issuance of common stock pursuant to restricted stock units | (1) |  | (1) |  |
Issuance of common stock pursuant to restricted stock units (in shares) |  | 551,450 |  |  |
Other comprehensive gain loss | (314) |  |  | (314) |
Net loss | (64,218) |  |  |  | (64,218)
Ending Balance at Sep. 30, 2022 | 81,973 | $ 35 | 326,617 | (376) | (244,303)
Ending Balance (in shares) at Sep. 30, 2022 |  | 35,262,233 |  |  |
Beginning Balance at Jun. 30, 2022 | 95,853 | $ 35 | 320,966 | (392) | (224,756)
Beginning Balance (in shares) at Jun. 30, 2022 |  | 34,976,409 |  |  |
Stock-based compensation expense | 5,595 |  | 5,595 |  |
Purchase of common stock under Employee Stock Purchase Plan | 57 |  | 57 |  |
Purchase of common stock under Employee Stock Purchase Plan (in shares) |  | 44,774 |  |  |
Issuance of common stock, net |  |  | (1) |  |
Issuance of common stock, net (in shares) |  | 200 |  |  |
Issuance of common stock pursuant to restricted stock units (in shares) |  | 240,850 |  |  |
Other comprehensive gain loss | 16 |  |  | 16 |
Net loss | (19,547) |  |  |  | (19,547)
Ending Balance at Sep. 30, 2022 | 81,973 | $ 35 | 326,617 | (376) | (244,303)
Ending Balance (in shares) at Sep. 30, 2022 |  | 35,262,233 |  |  |
Beginning Balance at Dec. 31, 2022 | $ 69,195 | $ 35 | 331,023 | (198) | (261,665)
Beginning Balance (in shares) at Dec. 31, 2022 | 35,262,083 | 35,262,083 |  |  |
Stock-based compensation expense | $ 9,253 |  | 9,253 |  |
Purchase of common stock under Employee Stock Purchase Plan | 33 |  | 33 |  |
Purchase of common stock under Employee Stock Purchase Plan (in shares) |  | 31,083 |  |  |
Issuance of common stock, net (in shares) |  | 2,969 |  |  |
Issuance of common stock pursuant to restricted stock units | 1 | $ 2 | (1) |  |
Issuance of common stock pursuant to restricted stock units (in shares) |  | 1,630,150 |  |  |
Other comprehensive gain loss | 208 |  |  | (208) |
Net loss | (41,953) |  |  |  | (41,953)
Ending Balance at Sep. 30, 2023 | $ 36,737 | $ 37 | 340,308 | 10 | (303,618)
Ending Balance (in shares) at Sep. 30, 2023 | 36,926,285 | 36,926,285 |  |  |
Beginning Balance at Jun. 30, 2023 | $ 45,408 | $ 36 | 337,382 | (6) | (292,004)
Beginning Balance (in shares) at Jun. 30, 2023 |  | 35,963,706 |  |  |
Stock-based compensation expense | 2,925 |  | 2,925 |  |
Purchase of common stock under Employee Stock Purchase Plan | 2 |  | 2 |  |
Purchase of common stock under Employee Stock Purchase Plan (in shares) |  | 6,329 |  |  |
Issuance of common stock pursuant to restricted stock units |  | $ 1 | (1) |  |
Issuance of common stock pursuant to restricted stock units (in shares) |  | 956,250 |  |  |
Other comprehensive gain loss | 16 |  |  | 16 |
Net loss | (11,614) |  |  |  | (11,614)
Ending Balance at Sep. 30, 2023 | $ 36,737 | $ 37 | $ 340,308 | $ 10 | $ (303,618)
Ending Balance (in shares) at Sep. 30, 2023 | 36,926,285 | 36,926,285 |  |  |

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