GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets and Goodwill [Line Items]
Amortization of intangibles	$ 3,494	$ 4,359	$ 5,213
Intangible Assets, Net[Abstract]
Intangible Assets, Gross	57,847	57,847
Accumulated amortization	(48,835)	(45,341)
Total	7,751
Total Intangible Assets, Net	$ 9,012	12,506
Minimum [Member]
Intangible Assets and Goodwill [Line Items]
Useful life (in years)	2 years
Maximum [Member]
Intangible Assets and Goodwill [Line Items]
Useful life (in years)	12 years
Developed technology
Intangible Assets, Net[Abstract]
Finite-Lived Intangible Assets, Gross	$ 37,960	37,960
Accumulated amortization	(31,603)	(29,126)
Total	6,357	8,834
Customer relationships
Intangible Assets, Net[Abstract]
Finite-Lived Intangible Assets, Gross	16,700	16,700
Accumulated amortization	(16,458)	(15,687)
Total	242	1,013
Technology licenses
Intangible Assets, Net[Abstract]
Finite-Lived Intangible Assets, Gross	1,926	1,926
Accumulated amortization	(774)	(528)
Total	1,152	1,398
Internet Domain Names [Member]
Intangible Assets, Net[Abstract]
Indefinite-Lived Intangible Assets	1,261	1,261
Accumulated amortization	$ 0	$ 0