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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Preferred Stock [Member] | Preferred Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Preferred Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Common Stock [Member] | Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Common Stock [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Additional Paid-In Capital [Member] | Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Stock Notes Receivable From Employees [Member] | Stock Notes Receivable From Employees [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Stock Notes Receivable From Employees [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Retained Earnings [Member] | Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2019 | $ 494,907 | $ (33) | $ 494,874 | $ 0 | $ 0 | $ 0 | $ 4 | $ 0 | $ 4 | $ 104,658 | $ 0 | $ 104,658 | $ (4) | $ 0 | $ (4) | $ 388,271 | $ (33) | $ 388,238 | $ 1,978 | $ 0 | $ 1,978
Beginning Balance, Shares at Dec. 31, 2019 |  |  |  | 0 | 0 | 0 | 39,153,195 | 0 | 39,153,195 |  |  |  |  |  |  |  |  |  |  |  |
Net and comprehensive income (loss) | 13,475 |  |  | $ 0 |  |  | $ 0 |  |  | 0 |  |  | 0 |  |  | 13,070 |  |  | 405 |  |
Stock-based compensation | 2,632 |  |  | $ 0 |  |  | $ 0 |  |  | 2,632 |  |  | 0 |  |  | 0 |  |  | 0 |  |
Stock-based compensation, Shares |  |  |  | 0 |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock for vesting of restricted stock units | 0 |  |  | $ 0 |  |  | $ 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |
Issuance of common stock for vesting of restricted stock units, Shares |  |  |  | 0 |  |  | 170,106 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares withheld related to net share settlement of stock-based awards | (1,689) |  |  | $ 0 |  |  | $ 0 |  |  | (1,689) |  |  | 0 |  |  | 0 |  |  | 0 |  |
Shares withheld related to net share settlement of stock-based awards, shares |  |  |  | 0 |  |  | (50,872) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Mar. 31, 2020 | 509,292 |  |  | $ 0 |  |  | $ 4 |  |  | 105,601 |  |  | (4) |  |  | 401,308 |  |  | 2,383 |  |
Ending Balance, Shares at Mar. 31, 2020 |  |  |  | 0 |  |  | 39,272,429 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2020 | 546,836 |  |  | $ 0 |  |  | $ 4 |  |  | 113,182 |  |  | 0 |  |  | 431,076 |  |  | 2,574 |  |
Beginning Balance, Shares at Dec. 31, 2020 |  |  |  | 0 |  |  | 39,401,976 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net and comprehensive income (loss) | 14,278 |  |  | $ 0 |  |  | $ 0 |  |  | 0 |  |  | 0 |  |  | 15,012 |  |  | (734) |  |
Stock-based compensation | 2,288 |  |  | $ 0 |  |  | $ 0 |  |  | 2,288 |  |  | 0 |  |  | 0 |  |  | 0 |  |
Stock-based compensation, Shares |  |  |  | 0 |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock for vesting of restricted stock units | 0 |  |  | $ 0 |  |  | $ 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 0 |  |
Issuance of common stock for vesting of restricted stock units, Shares |  |  |  | 0 |  |  | 149,117 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares withheld related to net share settlement of stock-based awards | (1,733) |  |  | $ 0 |  |  | $ 0 |  |  | (1,733) |  |  | 0 |  |  | 0 |  |  | 0 |  |
Shares withheld related to net share settlement of stock-based awards, shares |  |  |  | 0 |  |  | (50,127) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Mar. 31, 2021 | $ 561,669 |  |  | $ 0 |  |  | $ 4 |  |  | $ 113,737 |  |  | $ 0 |  |  | $ 446,088 |  |  | $ 1,840 |  |
Ending Balance, Shares at Mar. 31, 2021 |  |  |  | 0 |  |  | 39,500,966 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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