INCOME TAXES (Details 3) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Accrued compensation and benefits	$ 49	$ 28
Inventory reserves	1	26
Allowance for doubtful accounts	4	5
Warranty reserves	165	367
Intangible and other assets	994	2,512
Net operating loss carryforwards	3,897	6,949
Non-qualified stock option expense	0	0
Property, equipment and other	44	156
Research and development credit	2,230	2,059
Total deferred tax asset	7,384	12,102
Less: valuation allowance	(7,319)	(11,994)
Net deferred tax assets:	65	108
Deferred tax liabilities:
Prepaid expenses and other	(27)	(50)
Total deferred tax liability	(27)	(50)
Total net deferred tax asset	$ 38	$ 58