7. Shareholders' Equity (Details-Options outstanding)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Number of Shares
Outstanding options, beginning balance | shares	11,228,000
Granted | shares	2,015,000
Exercised | shares	(448,000)
Forfeited | shares	(290,000)
Outstanding options, ending balance | shares	12,595,000
Options exercisable | shares	7,396,000
Weighted Average Exercise Price
Outstanding options, beginning balance | $ / shares	$ 4.66
Granted | $ / shares	3.53
Exercised | $ / shares	1.41
Forfeited | $ / shares	5.93
Outstanding options, ending balance | $ / shares	4.56
Options exercisable | $ / shares	$ 4.03
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term, ending	5 years 7 days
Options exercisable	4 years 6 months 4 days