Quarterly report pursuant to Section 13 or 15(d)

REVENUE - Net Sales by Product and Service (Details)

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REVENUE - Net Sales by Product and Service (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Disaggregation of Revenue [Line Items]        
Net sales $ 47,043 $ 40,132 $ 150,320 $ 151,471
Less: sales returns (756) (494) (2,488) (3,075)
Product sales        
Disaggregation of Revenue [Line Items]        
Net sales 44,434 37,666 142,258 143,771
Freight and other        
Disaggregation of Revenue [Line Items]        
Net sales $ 3,365 $ 2,960 $ 10,550 $ 10,775