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v3.22.1

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings (Accumulated Deficit) [Member] | Total
--- | --- | --- | --- | ---
Balance at Dec. 31, 2019 | $ 426 | $ 117,557 | $ (72,872) | $ 45,111
Balance (in shares) at Dec. 31, 2019 | 42,628,560 |  |  |
Issuance of common stock for services |  | 35 |  | 35
Issuance of common stock for services (in shares) | 35,714 |  |  |
Stock compensation expense |  | 621 |  | 621
Issuance of common stock upon exercise of stock options | $ 7 | 56 |  | $ 63
Issuance of common stock upon exercise of stock options (in shares) | 683,613 |  |  | 1,967,562
Net Income (loss) |  |  | (5,208) | $ (5,208)
Balance at Dec. 31, 2020 | $ 433 | 118,269 | (78,080) | 40,622
Balance (in shares) at Dec. 31, 2020 | 43,347,887 |  |  |
Issuance of common stock for services | $ 1 |  |  | 1
Issuance of common stock for services (in shares) | 12,059 |  |  |
Stock compensation expense |  | 511 |  | 511
Issuance of common stock upon exercise of stock options | $ 14 | 187 |  | $ 201
Issuance of common stock upon exercise of stock options (in shares) | 1,398,979 |  |  | 3,076,489
Excess tax benefits from exercise of stock options |  | (2,655) |  | $ (2,655)
Net Income (loss) |  |  | 32,259 | 32,259
Balance at Dec. 31, 2021 | $ 448 | $ 116,312 | $ (45,821) | $ 70,939
Balance (in shares) at Dec. 31, 2021 | 44,758,925 |  |  |

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