INCOME TAXES (Details - Unrecognized Tax Benefits) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits beginning balance	$ 5,749,000	$ 5,957,000	$ 3,909,000
Increase for current year tax positions		51,000	66,000
Increase for prior year tax positions	1,954,000		2,037,000
Decrease for prior period tax positions		(189,000)
Expiration of the statute of limitation for assessment of taxes	(39,000)	(70,000)	(55,000)
Unrecognized tax benefits ending balance	7,664,000	5,749,000	5,957,000
Unrecognized tax benefits that would favorably affect the annual effective tax rate if recognized in future periods	1,400,000	1,500,000
Interest and penalties on income taxes recognized	83,000	62,000	62,000
Interest and penalties accrued on income taxes	$ 549,000	$ 466,000	$ 404,000