1. Summary of Significant Accounting Policies (Details-Options outstanding) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Number of Shares
Outstanding options, beginning balance	12,595,000
Granted	1,470,000
Exercised	(429,300)	(29,200)
Forfeited	(178,000)
Outstanding options, ending balance	13,458,000
Options exercisable at the end of period	8,475,000
Weighted Average Exercise Price
Outstanding options, beginning balance	$ 4.56
Granted	4.35
Exercised	1.72
Forfeited	5.67
Outstanding options, ending balance	4.61
Options exercisable at the end of period	$ 4.36
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term, ending	4 years 10 months 6 days
Options exercisable at the end of period	4 years 4 months 13 days