INCOME TAXES (Details - Income Tax Reconciliation when Applying the Statutory Federal Tax Rate) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of income tax provision to amounts computed by statutory federal income tax rate to income (loss) from continuing operations before income taxes
Income tax expense (benefit) at the federal statutory rate of 35%	$ 18,051	$ 9,920	$ (340)
State income taxes, net of effect of federal tax benefit	4,038	1,480	(143)
Release of valuation allowance	(416)	(34,409)	0
Research and experimentation tax credit	(2,574)	0	0
Other, net	1,267	36	(1)
Income tax expense (benefit)	$ 20,366	$ (22,973)	$ (484)
Federal Statutory Income Tax Rate (as a percent)	35.00%	35.00%