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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Taxes [Line Items]        
Tax credit carryforwards $ 11,500      
Increase in valuation allowance 300      
Deferred tax assets, valuation allowance 52,023 $ 51,689    
Unrecognized tax benefits 2,519 $ 1,921 $ 1,475 $ 1,026
Research Tax Credit Carryforward        
Income Taxes [Line Items]        
Tax credit carryforwards 9,500      
Foreign Tax Credit Carryforward        
Income Taxes [Line Items]        
Tax credit carryforwards $ 2,000