(1) Summary of Significant Accounting Policies (Details - Stock purchases) - Common Stock [Member] - $ / shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Schedule of Capitalization, Equity [Line Items]
Total stock purchases, shares	291,156	378,470
Total stock purchases, average price per share	$ 3.32	$ 3.97
Open Market Purchases[Member]
Schedule of Capitalization, Equity [Line Items]
Total stock purchases, shares	44,247	335,546
Total stock purchases, average price per share	$ 2.94	$ 3.95
Shares Redeemed [Member]
Schedule of Capitalization, Equity [Line Items]
Total stock purchases, shares	46,909	18,424
Total stock purchases, average price per share	$ 2.86	$ 3.76
Other Repurchases [Member]
Schedule of Capitalization, Equity [Line Items]
Total stock purchases, shares	200,000	24,500
Total stock purchases, average price per share	$ 3.51	$ 4.20