(7) Shareholders' Equity (Details - Stock purchases) - Common Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	4,139,664	3,884,876
Total stock purchases, average price per share	$ 11.11	$ 3.97
Open Market Purchases [Member]
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	3,246,511	1,639,138
Total stock purchases, average price per share	$ 10.44	$ 6.98
Shares Redeemed [Member]
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	893,153	245,743
Total stock purchases, average price per share	$ 13.56	$ 6.95
Other Share Repurchases [Member]
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	0	1,999,995
Total stock purchases, average price per share	$ 0	$ 6.26