4. Stockholders' Equity (Details - Restricted Stock) - Restricted Stock [Member] - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Restricted stock, beginning balance	2,553,957	1,293,056
Restricted stock granted	1,719,744	2,452,965
Restricted stock issued	(383,492)	(503,922)
Restricted stock forfeited	(313,875)	(688,142)
Restricted stock, ending balance	3,576,334	2,553,957
Restricted stock, beginning balance, Weighted Average Grant Date Fair Value	$ 2.82	$ 0.45
Restricted stock granted, Weighted Average Grant Date Fair Value	3.27	3.65
Restricted stock issued, Weighted Average Grant Date Fair Value	2.57	4.30
Restricted stock forfeited, Weighted Average Grant Date Fair Value	2.24	0.62
Restricted stock, ending balance, Weighted Average Grant Date Fair Value	$ 2.99	$ 2.82