9. Stock Options (Details - Option Activity) - Options [Member] - $ / shares	12 Months Ended		202 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2016
Common Stock, Capital Shares Reserved for Future Issuance [Roll Forward]
Total shares reserved for issuance, beginning balance	385,369	385,369
Total shares reserved for issuance, ending balance	385,369	385,369	385,369
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance	153,164	146,305
Options granted	11,138	19,975
Options Exercised			(114,631)
Options forfeited or expired	(31,300)	(13,116)
Options outstanding, ending balance	133,002	153,164	153,164
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, options outstanding, beginning balance	$ 10.84	$ 13.24
Weighted average exercise price, options granted	6.04	4.51
Weighted average exercise price, options forfeited or expired	10.79	10.38
Weighted average exercise price, options outstanding, ending balance	5.33	10.84	$ 10.84
Weighted average exercise price, options outstanding	5.33	10.84	10.84
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, options outstanding, beginning balance	2.70
Weighted average exercise price, options granted	7.35	4.51
Weighted average exercise price, options forfeited or expired	4.51	29.50
Weighted average exercise price, options outstanding, ending balance	2.70	2.70	2.70
Weighted average exercise price, options outstanding	2.70	2.70	2.70
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, options outstanding, beginning balance	18.22
Weighted average exercise price, options granted	7.35	4.50
Weighted average exercise price, options forfeited or expired	13.45	30.55
Weighted average exercise price, options outstanding, ending balance	18.22	18.22	18.22
Weighted average exercise price, options outstanding	$ 18.22	$ 18.22	$ 18.22