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NET SALES - Disaggregate revenue by location (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Disaggregation of revenue:        
Net sales $ 68,778 $ 72,212 $ 168,715 $ 243,961
Domestic        
Disaggregation of revenue:        
Net sales 66,621 69,136 161,172 229,266
International        
Disaggregation of revenue:        
Net sales $ 2,157 $ 3,076 $ 7,543 $ 14,695