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%