7. Shareholders' Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Repurchase of common stock, value	$ 5,900
Repurchase of common stock, shares	1,063,869
Weighted average exercise price of stock options granted	$ 2.41	$ 2.73	$ 4.79
Voliatility assumptions, minimum	47.00%	52.00%	50.00%
Voliatility assumptions, maximum	51.00%	55.00%	85.00%
Stock-based compensation	$ 5,024	$ 3,835	$ 3,864
Unrecognized stock-based compensation costs	$ 13,300
Weighted-average period for unrecognized costs	2 years 7 months 6 days
Intrinsic value options outstanding	$ 16,600	36,700
Intrinsic value of options exercisable	14,500	28,100
Intrinsic value of options exercised	6,400	$ 9,100
Proceeds from options exercised	1,700
Tax benefit from options exercised	$ 634
Shares available for grant	5,500,000
Warrants outstanding	2,000,000
Warrants exercisable	2,500,000
Warrants exercised, value	$ 4,071,429