INCOME TAXES (Details - Unrecognized Tax Benefits) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of unrecognized tax benefits, excluding interest
Balance, beginning of the period	$ 550	$ 19
Additions based on tax positions of the current year	198	550
Lapse of statute of limitations	0	(19)
Balance, end of the period	748	550	$ 19
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense			$ 100
Unrecognized Tax Benefits Including Interest	$ 700	$ 600