COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Intangible Assets [Table] [Line Items]
Intangible Assets, Gross	$ 57,847	$ 61,177
Finite-Lived Intangible Assets, Accumulated Amortization	(44,265)	(44,312)
Total	13,582	16,865
Finite-Lived Intangible Assets, Net	12,321
Developed technology
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross	37,960	37,960
Finite-Lived Intangible Assets, Accumulated Amortization	(28,327)	(25,933)
Finite-Lived Intangible Assets, Net	9,633	12,027
Customer relationships
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross	16,700	20,030
Finite-Lived Intangible Assets, Accumulated Amortization	(15,471)	(18,098)
Finite-Lived Intangible Assets, Net	1,229	1,932
Technology licenses
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross	1,926	1,926
Finite-Lived Intangible Assets, Accumulated Amortization	(467)	(281)
Finite-Lived Intangible Assets, Net	1,459	1,645
Internet Domain Names [Member]
Schedule of Intangible Assets [Table] [Line Items]
Indefinite-Lived Intangible Assets	$ 1,261	$ 1,261