INCOME TAXES (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
United States federal tax statutory rate	$ 137	$ (766)	$ (2,528)
State taxes, net of federal benefit	(6)	(233)	(36)
Valuation allowances against deferred tax assets	637	769	6,657
Research and development tax credits	(716)	(374)	(252)
Foreign provision different than U.S. tax rate	104	483	148
Stock option expense	21	33	28
Adjustment of prior year tax credits and refunds	(40)	102	(63)
Uncertain tax positions		(10)	(8)
Other	(119)	(158)	49
Total income tax expense (benefit)	$ 18	$ (154)	$ 3,995