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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Treasury Stock, Common [Member]
Additional Paid-In Capital [Member]
Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Deficit [Member]
Total
Beginning Balance at Dec. 31, 2021 $ 645 $ 0 $ 946,152 $ (161) $ (491,912) $ 454,724
Beginning Balance (in shares) at Dec. 31, 2021 64,505,889          
Issuance of common stock pursuant to exercise of stock options $ 0 0 76 0 0 76
Issuance of common stock pursuant to exercise of stock options (in shares) 16,168          
Unrealized comprehensive gain (loss) on investments $ 0 0 0 (468) 0 (468)
Stock-based compensation 0 0 6,270 0 0 6,270
Net loss 0 0 0 0 (42,982) (42,982)
Ending Balance at Mar. 31, 2022 $ 645 0 952,498 (629) (534,894) 417,620
Ending Balance (in shares) at Mar. 31, 2022 64,522,057          
Beginning Balance at Dec. 31, 2022 $ 791 (47) 1,203,074 (357) (713,775) 489,686
Beginning Balance (in shares) at Dec. 31, 2022 79,123,312          
Issuance of common stock pursuant to exercise of stock options $ 1 0 1,113 0 0 1,114
Issuance of common stock pursuant to exercise of stock options (in shares) 88,429          
Issuance of common stock pursuant to vesting of restricted stock units $ 1 0 (1) 0 0 0
Issuance of common stock pursuant to vesting of restricted stock units (in shares) 126,060          
Issuance of common stock pursuant to exercise of warrants $ 1 0 6 0 0 7
Issuance of common stock pursuant to exercise of warrant (in shares) 126,093          
Issuance of common stock pursuant to the at-the-market offering program, net of issuance costs $ 10 0 17,212 0 0 17,222
Issuance of common stock pursuant to the at-the-market offering program, net of issuance costs (in shares) 948,300          
Unrealized comprehensive gain (loss) on investments $ 0 0 0 267 0 267
Stock-based compensation 0 0 8,915 0 0 8,915
Net loss 0 0 0 0 (58,335) (58,335)
Ending Balance at Mar. 31, 2023 $ 804 $ (47) $ 1,230,319 $ (90) $ (772,110) $ 458,876
Ending Balance (in shares) at Mar. 31, 2023 80,412,194