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SIGNIFICANT ACCOUNTING POLICIES - NARRATIVE (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accounting Policies [Abstract]      
Credit terms, billing term, lower limit 10 days    
Credit terms, billing term, upper limit 60 days    
Sales volume discounts $ 500 $ 600 $ 300
Allowances for doubtful accounts 204 118  
Revenue, Major Customer [Line Items]      
Changes in excess and obsolete inventory 500 200 200
Brand name and trademark 1,510 1,510  
Shipping and handling costs 200 200 100
Advertising Expense 600 700 500
Research and development costs $ 2,455 $ 2,618 $ 2,160
Customer concentration risk      
Revenue, Major Customer [Line Items]      
Concentration risk, customer ten    
Trade receivable | Customer concentration risk | 10 largest customers      
Revenue, Major Customer [Line Items]      
Concentration receivable risk (as a percent) 44.00% 42.90%  
Net Revenue | Customer concentration risk | 10 largest customers      
Revenue, Major Customer [Line Items]      
Concentration receivable risk (as a percent) 48.30% 54.40% 58.30%
Net Revenue | Customer concentration risk | National Distribution & Contracting Inc.      
Revenue, Major Customer [Line Items]      
Concentration receivable risk (as a percent) 9.20% 9.80% 13.30%
Net Revenue | Customer concentration risk | McKesson      
Revenue, Major Customer [Line Items]      
Concentration receivable risk (as a percent) 15.70% 15.90% 18.60%