11. STOCK-BASED COMPENSATION (Details - Outstanding options and warrants) - Stock Options [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Shares Outstanding, beginning balance | shares	2,092,509
Shares exercised | shares	(1,135,833)
Shares forfeited or expired | shares	(25,009)
Shares outstanding, ending blance | shares	931,667
Exercisable, ending balance | shares	918,334
Weighted average exercise price, beginning balance | $ / shares	$ 3.58
Weighted average exercise price, exercised | $ / shares	2.69
Weighted average exercise price, forfeited or expired | $ / shares	2.22
Weighted average exercise price, ending balance | $ / shares	4.69
Weighted average exercise price, exercisable | $ / shares	$ 4.73
Weighted average remaining contractual life, ending balance	9 months 25 days
Weighted average remaining contractual life, exercisable	9 months 14 days
Aggregate intrinsic value, ending balance | $	$ 2,109,751
Aggregate intrinsic value, exercisable | $	$ 2,054,551