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PROPERTY AND EQUIPMENT - Components (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 78,230 $ 76,813
Less: Accumulated depreciation and amortization (56,984) (54,636)
Property and equipment, net 21,246 22,177
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 59,528 59,437
Machinery and equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Machinery and equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 10 years  
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 987 955
Furniture and fixtures | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Furniture and fixtures | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Computer equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 936 925
Computer equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Computer equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 11,578 11,358
Vehicles    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Property and equipment, gross $ 264 264
Software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,889 2,889
Software | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 1 year  
Software | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,048 $ 985