(7) Shareholders' Equity (Details - Stock purchases) - Common Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Total stock purchases, shares	3,884,876	351,926
Total stock purchases, average price per share	$ 6.61	$ 3.97
Open Market Purchases [Member]
Class of Stock [Line Items]
Total stock purchases, shares	1,639,138	105,017
Total stock purchases, average price per share	$ 6.98	$ 3.60
Shares Redeemed [Member]
Class of Stock [Line Items]
Total stock purchases, shares	245,743	46,909
Total stock purchases, average price per share	$ 6.95	$ 2.86
Other Share Repurchases [Member]
Class of Stock [Line Items]
Total stock purchases, shares	1,999,995	200,000
Total stock purchases, average price per share	$ 6.26	$ 3.51