INTANGIBLE ASSETS AND GOODWILL (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived		$ 1,400	$ 0	$ 1,406
Amortization Of Intangible Assets Including Impact Of Purchase Price Allocation Adjustments	$ 911	1,045	2,752	2,209
Finite-Lived Intangible Assets, Gross	30,267		30,267			$ 30,284
Finite-Lived Intangible Assets, Accumulated Amortization	(21,258)		(21,258)			(18,528)
Intangible Assets, Net (Excluding Goodwill)	9,009		9,009			$ 11,756
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	846	896	2,539	2,687
Selling and Marketing Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	10	16	31	48
General and Administrative Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 55	$ 133	$ 182	$ (526)
Mac Warehouse, LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasons					$ 1,400