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CONSOLIDATED STATEMENTS OF STOCKHOLDERS DEFICIT (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Series B Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Accumulated Other Comprehensive Loss
Balance, shares at Dec. 31, 2020   1,323 22,830      
Balance, amount at Dec. 31, 2020 $ (184,744) $ 1 $ 23 $ 93,426 $ (274,080) $ (4,114)
Issuance of common stock, shares     5,682      
Issuance of common stock, amount 62,395 0 $ 6 62,389 0 0
Stock options exercised, shares     1,226      
Stock options exercised, amount 1,003 0 $ 1 1,002 0 0
Stock-based compensation 835 0 $ 0 835 0 0
Issuance and exercise of warrants, shares     113      
Issuance and exercise of warrants, amount 281 0 $ 0 281 0 0
Foreign currency translation loss (25) 0 0 0 0 (25)
Net loss (18,112) $ 0 $ 0 0 (18,112) 0
Balance, shares at Mar. 31, 2021   1,323 29,851      
Balance, amount at Mar. 31, 2021 (138,367) $ 1 $ 30 157,933 (292,192) (4,139)
Balance, shares at Dec. 31, 2020   1,323 22,830      
Balance, amount at Dec. 31, 2020 (184,744) $ 1 $ 23 93,426 (274,080) (4,114)
Stock-based compensation 1,116          
Net loss (28,669)          
Balance, shares at Jun. 30, 2021   1,323 31,572      
Balance, amount at Jun. 30, 2021 (124,024) $ 1 $ 32 183,015 (302,749) (4,323)
Balance, shares at Mar. 31, 2021   1,323 29,851      
Balance, amount at Mar. 31, 2021 (138,367) $ 1 $ 30 157,933 (292,192) (4,139)
Issuance of common stock, shares     976      
Issuance of common stock, amount 24,774 0 $ 1 24,773 0 0
Stock options exercised, shares     745      
Stock options exercised, amount 29 0 $ 1 28 0 0
Stock-based compensation 281 0 0 281 0 0
Foreign currency translation loss (184) $ 0 $ 0 0 0 (184)
Net loss (10,557)       (10,557)  
Balance, shares at Jun. 30, 2021   1,323 31,572      
Balance, amount at Jun. 30, 2021 (124,024) $ 1 $ 32 183,015 (302,749) (4,323)
Balance, shares at Dec. 31, 2021   1,275 33,461      
Balance, amount at Dec. 31, 2021 (120,238) $ 1 $ 33 205,305 (321,227) (4,350)
Issuance of common stock, shares     341      
Issuance of common stock, amount 3,349 0 $ 1 3,348 0 0
Stock options exercised, shares     263      
Stock options exercised, amount 196 0 $ 0 196 0 0
Stock-based compensation 2,040 0 $ 0 2,040 0 0
Issuance and exercise of warrants, shares     113      
Issuance and exercise of warrants, amount 4,550 0 $ 0 4,550 0 0
Foreign currency translation loss (194) 0 0 0 0 (194)
Net loss (18,294) $ 0 $ 0 0 (18,294) 0
Series B conversion to common stock, shares   (5) 1      
Series B conversion to common stock, amount 0 $ 0 $ 0 0 0 0
Balance, shares at Mar. 31, 2022   1,270 34,179      
Balance, amount at Mar. 31, 2022 (128,591) $ 1 $ 34 215,439 (339,521) (4,544)
Balance, shares at Dec. 31, 2021   1,275 33,461      
Balance, amount at Dec. 31, 2021 (120,238) $ 1 $ 33 205,305 (321,227) (4,350)
Stock-based compensation 3,389          
Net loss (18,503)          
Balance, shares at Jun. 30, 2022   1,270 34,582      
Balance, amount at Jun. 30, 2022 (122,713) $ 1 $ 35 221,915 (339,730) (4,934)
Balance, shares at Mar. 31, 2022   1,270 34,179      
Balance, amount at Mar. 31, 2022 (128,591) $ 1 $ 34 215,439 (339,521) (4,544)
Issuance of common stock, shares     400      
Issuance of common stock, amount 5,124 0 $ 1 5,123 0 0
Stock options exercised, shares     3      
Stock options exercised, amount 4 0 $ 0 4 0 0
Stock-based compensation 1,349 0 0 1,349 0 0
Foreign currency translation loss (390) 0 0 0 0 (390)
Net loss (209) $ 0 $ 0 0 (209) 0
Balance, shares at Jun. 30, 2022   1,270 34,582      
Balance, amount at Jun. 30, 2022 $ (122,713) $ 1 $ 35 $ 221,915 $ (339,730) $ (4,934)