Summary of Significant Accounting Policies (Details - Stock purchases) - Common Stock [Member] - $ / shares	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	1,784,246	2,831,790
Total stock purchases, average price per share	$ 10.35	$ 12.09
Open Market Purchases [Member]
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	564,202	1,938,637
Total stock purchases, average price per share	$ 10.36	$ 11.42
Shares Redeemed [Member]
Equity, Class of Treasury Stock [Line Items]
Total stock purchases, shares	1,220,044	893,153
Total stock purchases, average price per share	$ 10.34	$ 13.56