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CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($)
shares in Thousands
Total
Series Preferred B Stock
Common Stock
Additional Paid-In Capital
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Noncontrolling Interest
Balance, shares at Dec. 31, 2018   1,323 20,345        
Balance, amount at Dec. 31, 2018 $ (115,582,000) $ 1,000 $ 20,000 $ 85,917,000 $ (193,204,000) $ (3,576,000) $ (4,740,000)
Stock-based compensation 774,000 0 $ 0 774,000 0 0 0
Issuance and exercise of warrants, shares     225        
Issuance and exercise of warrants, amount 162,000 0 $ 1,000 161,000 0 0 0
Foreign currency translation loss (249,000) 0 0 0 0 (249,000) 0
Net loss (39,477,000) 0 0 0 (35,716,000) 0 (3,761,000)
Reclassification of GAFI noncontrolling interest 0 $ 0 $ 0 0 (8,501,000) 0 8,501,000
Balance, shares at Dec. 31, 2019   1,323 20,570        
Balance, amount at Dec. 31, 2019 (154,372,000) $ 1,000 $ 21,000 86,852,000 (237,421,000) (3,825,000)  
Stock-based compensation 995,000 0 $ 0 995,000 0 0 0
Issuance and exercise of warrants, shares     225        
Issuance and exercise of warrants, amount 181,000 0 $ 0 181,000 0 0 0
Foreign currency translation loss (289,000) 0 0 0 0 (289,000) 0
Net loss (36,659,000) 0 $ 0 0 (36,659,000) 0 0
Issuance of common stock, shares     1,507        
Issuance of common stock, amount 5,113,000 0 $ 2,000 5,111,000 0 0 0
Stock options exercised, shares     528        
Stock options exercised, amount 287,000 $ 0 $ 0 287,000 0 0 0
Balance, shares at Dec. 31, 2020   1,323 22,830        
Balance, amount at Dec. 31, 2020 (184,744,000) $ 1,000 $ 23,000 93,426,000 (274,080,000) (4,114,000)  
Stock-based compensation $ 3,928,000 0 $ 0 3,928,000 0 0 0
Issuance and exercise of warrants, shares 1,344   331        
Issuance and exercise of warrants, amount $ 2,942,000 0 $ 0 2,942,000 0 0 0
Foreign currency translation loss (236,000) 0 0 0 0 (236,000) 0
Net loss (47,147,000) 0 $ 0 0 (47,147,000) 0 0
Issuance of common stock, shares     7,796        
Issuance of common stock, amount 103,768,000 0 $ 8,000 103,760,000 0 0 0
Stock options exercised, shares     2,499        
Stock options exercised, amount 1,251,000 $ 0 $ 2,000 1,249,000 0 0 0
Sereis B conversion to common stock, shares   (48) 5        
Sereis B conversion to common stock, amount 0 $ 0 $ 0 0 0 0 0
Balance, shares at Dec. 31, 2021   1,275 33,461        
Balance, amount at Dec. 31, 2021 $ (120,238,000) $ 1,000 $ 33,000 $ 205,305,000 $ (321,227,000) $ (4,350,000) $ 0