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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

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