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Consolidated Statements of Stockholders' Deficit - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2021 1,275 33,461        
Balance at Dec. 31, 2021 $ 1 $ 33 $ 205,305 $ (321,227) $ (4,350) $ (120,238)
Issuance of common stock (in shares) 0 1,885        
Issuance of common stock $ 0 $ 3 15,530 0 0 15,533
Series B conversion to common stock (in shares) (5) (1)        
Series B conversion to common stock $ 0 $ 0 0 0 0 0
Series B conversion to common stock (in shares) 5 1        
Stock options exercised (in shares) 0 296        
Stock options exercised $ 0 $ 0 205 0 0 205
Stock-based compensation $ 0 $ 0 6,410 0 0 6,410
Issuance and exercise of warrants (in shares) 0 226        
Issuance and exercise of warrants $ 0 $ 0 5,096 0 0 5,096
Foreign currency translation loss 0 0 0 0 (1,102) (1,102)
Net loss $ 0 $ 0 0 (107,758) 0 (107,758)
Series B conversion to common stock (in shares) 5 1        
Balance (in shares) at Dec. 31, 2022 1,270 35,869        
Balance at Dec. 31, 2022 $ 1 $ 36 232,546 (428,985) (5,452) (201,854)
Issuance of common stock (in shares) 0 4,499        
Issuance of common stock $ 0 $ 4 21,714 0 0 21,718
Series B conversion to common stock (in shares) (1,270) (127)        
Series B conversion to common stock $ (1) $ 1 0 0 0 0
Series B conversion to common stock (in shares) 1,270 127        
Stock options exercised (in shares) 0 183        
Stock options exercised $ 0 $ 0 133 0 0 133
Stock-based compensation $ 0 $ 0 7,660 0 0 7,660
Issuance and exercise of warrants (in shares) 0 288        
Issuance and exercise of warrants $ 0 $ 0 2,005 0 0 2,005
Foreign currency translation loss 0 0 0 0 (219) (219)
Net loss $ 0 $ 0 0 (46,420) 0 (46,420)
Series B conversion to common stock (in shares) 1,270 127        
Balance (in shares) at Dec. 31, 2023 0 40,966        
Balance at Dec. 31, 2023 $ 0 $ 41 $ 264,058 $ (475,405) $ (5,671) $ (216,977)