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Consolidated Statements of Stockholders' Deficit (Unaudited) - 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, 2020 1,323 22,830        
Balance at Dec. 31, 2020 $ 1 $ 23 $ 93,426 $ (274,080) $ (4,114) $ (184,744)
Issuance of common stock (in shares) 0 5,682        
Issuance of common stock $ 0 $ 6 62,389 0 0 62,395
Stock options exercised (in shares) 0 1,226        
Stock options exercised $ 0 $ 1 1,002 0 0 1,003
Stock-based compensation $ 0 $ 0 835 0 0 835
Issuance and exercise of warrants (in shares) 0 113        
Issuance and exercise of warrants $ 0 $ 0 281 0 0 281
Net loss 0 0 0 (18,112) 0 (18,112)
Foreign currency translation gain (loss) $ 0 $ 0 0 0 (25) (25)
Balance (in shares) at Mar. 31, 2021 1,323 29,851        
Balance at Mar. 31, 2021 $ 1 $ 30 157,933 (292,192) (4,139) (138,367)
Balance (in shares) at Dec. 31, 2020 1,323 22,830        
Balance at Dec. 31, 2020 $ 1 $ 23 93,426 (274,080) (4,114) (184,744)
Foreign currency translation gain (loss)           (187)
Net loss           (46,266)
Balance (in shares) at Sep. 30, 2021 1,285 32,564        
Balance at Sep. 30, 2021 $ 1 $ 33 192,520 (320,346) (4,301) (132,093)
Balance (in shares) at Mar. 31, 2021 1,323 29,851        
Balance at Mar. 31, 2021 $ 1 $ 30 157,933 (292,192) (4,139) (138,367)
Issuance of common stock (in shares) 0 976        
Issuance of common stock $ 0 $ 1 24,773 0 0 24,774
Stock options exercised (in shares) 0 745        
Stock options exercised $ 0 $ 1 28 0 0 29
Stock-based compensation 0 0 281 0 0 281
Foreign currency translation gain (loss) 0 0 0 0 (184) (184)
Net loss $ 0 $ 0 0 (10,557) 0 (10,557)
Balance (in shares) at Jun. 30, 2021 1,323 31,572        
Balance at Jun. 30, 2021 $ 1 $ 32 183,015 (302,749) (4,323) (124,024)
Issuance of common stock (in shares) 0 576        
Issuance of common stock $ 0 $ 1 7,883 0 0 7,884
Series B conversion to common stock (in shares) (38)          
Series B conversion to common stock $ 0 $ 0 0 0 0 0
Series B conversion to common stock, Shares Issued (in shares)   4        
Stock options exercised (in shares) 0 299        
Stock options exercised $ 0 $ 0 72 0 0 72
Stock-based compensation $ 0 $ 0 285 0 0 285
Issuance and exercise of warrants (in shares) 0 113        
Issuance and exercise of warrants $ 0 $ 0 1,265 0 0 1,265
Foreign currency translation gain (loss) 0 0 0 0 22 22
Net loss $ 0 $ 0 0 (17,597) 0 (17,597)
Balance (in shares) at Sep. 30, 2021 1,285 32,564        
Balance at Sep. 30, 2021 $ 1 $ 33 192,520 (320,346) (4,301) (132,093)
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) 0 341        
Issuance of common stock $ 0 $ 1 3,348 0 0 3,349
Series B conversion to common stock (in shares) (5)          
Series B conversion to common stock $ 0 $ 0 0 0 0 0
Series B conversion to common stock, Shares Issued (in shares)   1        
Stock options exercised (in shares) 0 263        
Stock options exercised $ 0 $ 0 196 0 0 196
Stock-based compensation $ 0 $ 0 2,040 0 0 2,040
Issuance and exercise of warrants (in shares) 0 113        
Issuance and exercise of warrants $ 0 $ 0 4,550 0 0 4,550
Foreign currency translation gain (loss) 0 0 0 0 (194) (194)
Net loss $ 0 $ 0 0 (18,294) 0 (18,294)
Balance (in shares) at Mar. 31, 2022 1,270 34,179        
Balance at Mar. 31, 2022 $ 1 $ 34 215,439 (339,521) (4,544) (128,591)
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)
Foreign currency translation gain (loss)           (884)
Net loss           (85,348)
Balance (in shares) at Sep. 30, 2022 1,270 35,043        
Balance at Sep. 30, 2022 $ 1 $ 35 226,883 (406,575) (5,234) (184,890)
Balance (in shares) at Mar. 31, 2022 1,270 34,179        
Balance at Mar. 31, 2022 $ 1 $ 34 215,439 (339,521) (4,544) (128,591)
Issuance of common stock (in shares) 0 400        
Issuance of common stock $ 0 $ 1 5,123 0 0 5,124
Stock options exercised (in shares) 0 3        
Stock options exercised $ 0 $ 0 4 0 0 4
Stock-based compensation 0 0 1,349 0 0 1,349
Foreign currency translation gain (loss) 0 0 0 0 (390) (390)
Net loss $ 0 $ 0 0 (209) 0 (209)
Balance (in shares) at Jun. 30, 2022 1,270 34,582        
Balance at Jun. 30, 2022 $ 1 $ 35 221,915 (339,730) (4,934) (122,713)
Issuance of common stock (in shares) 0 319        
Issuance of common stock $ 0 $ 0 2,872 0 0 2,872
Stock options exercised (in shares) 0 29        
Stock options exercised $ 0 $ 0 5 0 0 5
Stock-based compensation $ 0 $ 0 1,545 0 0 1,545
Issuance and exercise of warrants (in shares) 0 113        
Issuance and exercise of warrants $ 0 $ 0 546 0 0 546
Foreign currency translation gain (loss) 0 0 0 0 (300) (300)
Net loss $ 0 $ 0 0 (66,845) 0 (66,845)
Balance (in shares) at Sep. 30, 2022 1,270 35,043        
Balance at Sep. 30, 2022 $ 1 $ 35 $ 226,883 $ (406,575) $ (5,234) $ (184,890)