8. Stockholders' Equity (Details - Option activity) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Options
Beginning balance	10,747,558	7,281,250	7,211,479
Granted	2,848,231	4,130,000	337,750
Exercised	(181,572)	(159,678)	0
Forfeited	(2,540,925)	(504,014)	(267,979)
Ending balance	10,873,292	10,747,558	7,281,250
Exercisable	7,692,566
Vested	8,031,986
Weighted Average Price
Beginning balance	$ 0.67	$ 0.17	$ 0.15
Granted	3.76	1.53	0.56
Exercised	0.26	0.13
Forfeited	2.31	1.19
Ending balance	1.50	0.67	0.17
Exercisable	0.57
Vested	0.66
Intrinsic Value
Beginning balance	3.56	0.17	0.17
Granted
Exercised	6.86	1.42
Forfeited	3.20	3.36
Ending balance	5.08	$ 3.56	$ 0.17
Exercisable	6.16
Vested	$ 6.94
Weighted average remaining contractual term
Weighted average contractual term	6 years 7 months 24 days	7 years 9 months	7 years
Granted	6 years 1 month 24 days	9 years 9 months	10 years
Exercisable	5 years 8 months 26 days
Vested	5 years 10 months 13 days