1. Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Warrants outstanding	2,000,000		2,000,000
Stock based compensation costs	$ 1,700	$ 1,400	$ 4,266	$ 4,004
Unrecognized stock-based compensation costs	7,200		$ 7,200
Unrecognized stock-based compensation costs amortization period			2 years
Aggregate intrinsic value outstanding	12,900		$ 12,900
Aggregate intrinsic value exercisable	$ 11,200		$ 11,200
Options Exercised			619,000	127,000
Total intrinsic value of options exercised			$ 1,800	$ 379
Shares available for future grants	2,500,000		2,500,000
Repurchase of common stock, shares repurchased			1,978,000	0
Repurchase of common stock average share price			$ 4.05
Common Stock [Member]
Repurchase of common stock, shares repurchased			2,337,000
Repurchase of common stock average share price			$ 4.51
Common Stock [Member] | Open market [Member]
Repurchase of common stock, shares repurchased			2,292,000
Repurchase of common stock average share price			$ 4.51
Common Stock [Member] | Net exercises of outstanding options [Member]
Repurchase of common stock, shares repurchased			45,000