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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
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