10. Stock Options (Details - Options by exercise price) - shares	Dec. 31, 2016	Dec. 31, 2015
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise prices of options outstanding	153,164	146,305
$2.70 - $9.99 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise prices of options outstanding	39,164	19,189
$10.00 - $14.99 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise prices of options outstanding	90,500	103,616
$15.00 - $19.99 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise prices of options outstanding	23,500	23,500