ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (958)	$ (1,339)	$ (1,226)	$ (757)
Allowance for sales returns and exchanges	(8,230)	(9,003)	$ (9,916)	$ (7,861)
Accounts receivable, net	$ 73,773	$ 67,754