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INCOME TAXES - Differences Between Income Taxes Computed at Statutory Income Tax Rate and Provision For Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Income taxes computed at federal statutory rate | $ 4,028 | $ (10,146) | $ 10,029
State income taxes, net of federal benefit | 1,017 | (2,625) | 1,331
Foreign taxes | 186 | (493) | 311
Nondeductible expenses | 353 | 5,617 | 1,108
Enacted rate changes | 318 | 670 | 0
Research and development tax credit | (1,036) | (16,879) | (2,324)
Foreign tax credit | 0 | 0 | (57)
Valuation allowance | 1 | 16 | (5)
Tax reform deferred tax remeasurement | (2,587) | 0 | 0
Deferred tax liability true up | (62) | (551) | 1,065
Uncertain tax positions | 871 | 5,057 | 665
Other | 342 | 638 | (929)
Total income tax expense (benefit) | $ 3,431 | $ (18,696) | $ 11,194

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