1. Purchases of Company Stock (Details - Stock purchases) - Common Stock [Member] - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total stock purchases, shares	0	365,546
Total stock purchases, average price per share		$ 3.97
Open Market Purchases [Member]
Total stock purchases, shares	0	335,546
Total stock purchases, average price per share		$ 3.95
Shares redeemed upon net exercise of stock options [Member]
Total stock purchases, shares	0	5,500
Total stock purchases, average price per share		$ 4.20
Other Repurchases [Member]
Total stock purchases, shares	0	24,500
Total stock purchases, average price per share		$ 4.20