VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 610	$ 431	$ 489
Additions charged (credited) to costs and expenses	1,776	43	126
Adjustments/deductions	(306)	136	(184)
Ending balance	2,080	610	431
Inventory Reserve
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	2,575	2,315	2,546
Additions charged (credited) to costs and expenses	7,069	898	538
Adjustments/deductions	(5,363)	(638)	(769)
Ending balance	$ 4,281	$ 2,575	$ 2,315