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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) $ in Thousands | Total | Impact of ASC 842 adoption | Common Stock | Additional Paid-in Capital | Accumulated Deficit | Accumulated Deficit Impact of ASC 842 adoption
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2020 | 0 |  |  |  |  |
Beginning balance at Dec. 31, 2020 | $ 0 |  |  |  |  |
Ending balance (in shares) at Mar. 31, 2021 | 0 |  |  |  |  |
Ending balance at Mar. 31, 2021 | $ 0 |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2020 |  |  | 31,432,477 |  |  |
Beginning balance at Dec. 31, 2020 | (949) |  | $ 3 | $ 57,097 | $ (58,049) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock options exercised (in shares) |  |  | 257,444 |  |  |
Stock options exercised | 84 |  |  | 84 |  |
Stock-based compensation expense | 80 |  |  | 80 |  |
Net (loss) income | 8,090 |  |  |  | 8,090 |
Ending balance (in shares) at Mar. 31, 2021 |  |  | 31,689,921 |  |  |
Ending balance at Mar. 31, 2021 | $ 7,305 |  | $ 3 | 57,261 | (49,959) |
Beginning balance (in shares) at Dec. 31, 2020 | 0 |  |  |  |  |
Beginning balance at Dec. 31, 2020 | $ 0 |  |  |  |  |
Ending balance (in shares) at Dec. 31, 2021 | 0 |  |  |  |  |
Ending balance at Dec. 31, 2021 | $ 0 |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2020 |  |  | 31,432,477 |  |  |
Beginning balance at Dec. 31, 2020 | $ (949) |  | $ 3 | 57,097 | (58,049) |
Ending balance (in shares) at Dec. 31, 2021 | 97,574,171 |  | 97,574,171 |  |  |
Ending balance at Dec. 31, 2021 | $ 40,799 | $ (1,962) | $ 10 | 77,632 | (36,843) | $ (1,962)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Accounting standards update extensible enumeration | Accounting Standards Update 2016-02 [Member] |  |  |  |  |
Ending balance (in shares) at Mar. 31, 2022 | 0 |  |  |  |  |
Ending balance at Mar. 31, 2022 | $ 0 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock options exercised (in shares) |  |  | 275,435 |  |  |
Stock options exercised | 60 |  |  | 60 |  |
Vesting of restricted stock units (in shares) |  |  | 378,425 |  |  |
Repurchases of restricted stock for payroll tax withholding (in shares) |  |  | (102,019) |  |  |
Repurchases of restricted stock for payroll tax withholding | (195) |  |  | (195) |  |
Stock-based compensation expense | 1,089 |  |  | 1,089 |  |
Net (loss) income | $ (5,558) |  |  |  | (5,558) |
Ending balance (in shares) at Mar. 31, 2022 | 98,126,012 |  | 98,126,012 |  |  |
Ending balance at Mar. 31, 2022 | $ 34,233 |  | $ 10 | $ 78,586 | $ (44,363) |

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