Annual report pursuant to Section 13 and 15(d)

REVENUE (Details)

v3.19.1
REVENUE (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disaggregation of Revenue [Line Items]    
Actual sales returns rate 2.00% 2.00%
Cash payments received toward unshipped products $ 4.5  
Revenue recognized that was included in deferred revenue in prior year $ 2.4  
Minimum    
Disaggregation of Revenue [Line Items]    
Sales return policy term 14 days  
Historical sales returns rate 1.00%  
Maximum    
Disaggregation of Revenue [Line Items]    
Sales return policy term 1 year  
Historical sales returns rate 5.00%