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SIGNIFICANT ACCOUNTING POLICIES - Basis of Consolidation and Presentation (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Concentration Risk [Line Items]      
Number of reportable segments | segment 1    
Net sales to all dealers $ 239,825 $ 292,136 $ 298,616
Net sales | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, customer 0    
Percent of net sales 10    
Net sales | International dealers      
Concentration Risk [Line Items]      
Net sales to all dealers $ 11,800 $ 17,000 $ 19,400