COMMITMENTS (Details - Operating Leases) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Future minimum payments under operating lease
Operating Leases, Future Minimum Payments, Due in One Year	$ 1,374
Operating Leases, Future Minimum Payments, Due in Two Years	1,227
Operating Leases, Future Minimum Payments, Due in Three Years	1,025
Operating Leases, Future Minimum Payments, Due in Four Years	1,055
Operating Leases, Future Minimum Payments, Due in Five Years	0
Total	4,681
Operating Leases, Rent Expense, Net	$ 1,600	$ 1,200	$ 1,100