INCOME TAXES (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
INCOME TAXES [Abstract]
United States federal tax statutory rate	$ 384	$ 390
State taxes, net of federal benefit	(185)	(54)
Changes in valuation allowances against deferred tax assets	(5,246)	(251)
Research and development tax credits	(184)	(90)
Foreign provision different than U.S. tax rate	0	6
Adjustment of prior year tax credits and refunds	16	(24)
Other	50	13
Total income tax expense (benefit)	$ (5,165)	$ (10)