INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Purchased technology, net	$ 179	$ 215
Goodwill	185	185
Amortization of Intangible Assets	100	100	$ 100
Brand name and trademark (life indefinite)
Indefinite-lived Intangible Assets [Line Items]
Brand name and trademark (life indefinite)	1,510	1,510
Purchased Technology
Finite-Lived Intangible Assets [Line Items]
Purchased technology (5-17 year lives)	1,513	1,441
Less: accumulated amortization	(1,334)	(1,226)
Purchased technology, net	$ 179	$ 215
Purchased Technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life (in years)	5 years
Purchased Technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life (in years)	17 years