Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited)

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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Beginning balance, value at Dec. 31, 2022 $ 12 $ 677,375 $ (167) $ (470,038) $ 207,182
Balance, at beginning (in shares) at Dec. 31, 2022 12,368,620        
Repurchase of common stock under share repurchase program, including transactional expenses of $334 $ (3) (13,962) (13,965)
Repurchase of common stock under share repurchase program, including transactional expenses of $334 (in shares) (2,672,044)        
Issuance of common stock under 2022 Purchase agreement with Lincoln Park 441 441
Issuance of common stock under 2022 Purchase agreement with Lincoln Park (in shares) 96,000        
Issuance of common stock net of transactional expenses of $101 $ 1 1,994 1,995
Issuance of common stock net of transactional expenses of $101 (in shares) 514,493        
Employee stock purchase plan 29 29
Employee stock purchase plan (in shares) 14,999        
Stock-based compensation 2,794 2,794
Foreign currency translation loss (44) (44)
Net loss (33,005) (33,005)
Ending balance, value at Mar. 31, 2023 $ 10 682,633 (211) (517,005) 165,427
Balance, at end (in shares) at Mar. 31, 2023 10,322,068        
Beginning balance, value at Dec. 31, 2023 $ 59 706,356 (232) (600,658) 105,525
Balance, at beginning (in shares) at Dec. 31, 2023 58,614,593        
Issuance of common stock upon exercise of prefunded common warrants $ 15 (15)
Issuance of common stock upon exercise of prefunded common warrants (in shares) 15,043,244        
Fair value of warrants reclassified from liabilities to equity 15,850 15,850
Employee stock purchase plan 23 23
Employee stock purchase plan (in shares) 66,359        
Stock-based compensation 1,692 1,692
Foreign currency translation loss (8) (8)
Net loss (14,939) (14,939)
Ending balance, value at Mar. 31, 2024 $ 74 $ 723,906 $ (240) $ (615,597) $ 108,143
Balance, at end (in shares) at Mar. 31, 2024 73,724,196