INCOME TAXES (Details - Reconciliation of Provision for Income Taxes) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective tax rate reconciliation [Abstract]
Expected federal income tax provision at statutory rate	$ 903	$ 24,820	$ 16,638
State income taxes, net of federal benefit	(678)	1,965	885
Foreign income taxes, net effect	469	336	(724)
Increase (decrease) in valuation allowance	1,956	(2,397)	588
Nondeductible compensation	574	554	431
Nondeductible transaction costs	229	0	0
Meals and entertainment	1,032	415	272
Tax law changes	1,203	61	25
Other adjustments	358	290	(312)
Income tax expense, net	$ 6,046	$ 26,044	$ 17,803