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Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Total
Balance at Dec. 31, 2022 $ 64 $ 440,954 $ (350,596) $ 90,422
Balance (in shares) at Dec. 31, 2022 64,517,912      
Issuance of common stock upon exercise of stock options   79 0 79
Issuance of common stock upon exercise of stock options (in shares) 21,447      
Issuance of common stock upon vesting of restricted stock units $ 1 (1) 0  
Issuance of common stock upon vesting of restricted stock units (in shares) 89,804      
Issuance of common stock under employee stock purchase plan   335 0 335
Issuance of common stock under employee stock purchase plan (in shares) 81,281      
Stock-based compensation   2,552 0 2,552
Net loss     (11,745) (11,745)
Balance at Mar. 31, 2023 $ 65 443,919 (362,341) 81,643
Balance (in shares) at Mar. 31, 2023 64,710,444      
Balance at Dec. 31, 2022 $ 64 440,954 (350,596) 90,422
Balance (in shares) at Dec. 31, 2022 64,517,912      
Balance at Dec. 31, 2023 $ 69 476,322 (429,098) 47,293
Balance (in shares) at Dec. 31, 2023 68,629,575      
Issuance of common stock upon exercise of stock options   99 0 $ 99
Issuance of common stock upon exercise of stock options (in shares) 23,247     23,247
Issuance of common stock upon vesting of restricted stock units     0  
Issuance of common stock upon vesting of restricted stock units (in shares) 383,133      
Issuance of common stock under employee stock purchase plan   404 0 $ 404
Issuance of common stock under employee stock purchase plan (in shares) 67,982      
Issuance of common stock upon exercise of warrants (in shares) 946      
Issuance of common stock upon exercise of warrants     0  
Sale of common stock, net $ 7 74,861 0 74,868
Sale of common stock, net (in shares) 7,182,532      
Stock-based compensation   4,524 0 4,524
Net loss     (40,928) (40,928)
Balance at Mar. 31, 2024 $ 76 $ 556,210 $ (470,026) $ 86,260
Balance (in shares) at Mar. 31, 2024 76,287,415