The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Purchased technology, net	$ 6	$ 67
Goodwill	185	185
Amortization of Intangible Assets	100	100	$ 100
Brand name and trademark
Indefinite-lived Intangible Assets [Line Items]
Brand name and trademark (life indefinite) of discontinued operations	0	1,510
Purchased Technology
Finite-Lived Intangible Assets [Line Items]
Purchased technology	1,448	1,401
Less: accumulated amortization	(1,442)	(1,334)
Purchased technology, net	$ 6	179
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
Purchased Technology \| Core
Finite-Lived Intangible Assets [Line Items]
Purchased technology	$ 0	$ 112