INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Purchased technology, net	$ 32		$ 32		$ 67
Goodwill	185		185		185
Amortization of Intangible Assets	27	$ 27	81	$ 81
Brand name and trademark
Indefinite-lived Intangible Assets [Line Items]
Brand name and trademark	0		0		1,510
Purchased technology and license rights, net of depreciation
Finite-Lived Intangible Assets [Line Items]
Purchased technology	1,447		1,447		1,401
Less: accumulated amortization	(1,415)		(1,415)		(1,334)
Purchased technology, net	32		$ 32		179
Purchased technology and license rights, net of depreciation | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life (in years)			5 years
Purchased technology and license rights, net of depreciation | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life (in years)			17 years
Purchased technology and license rights, net of depreciation | Core
Finite-Lived Intangible Assets [Line Items]
Purchased technology	$ 0		$ 0		$ 112