Fair Value of Financial Instruments (Details 1) - USD ($)	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2021
Fair value	$ 4,272,100	$ 6,391,600	$ 3,744,600
Cost	4,417,400	6,532,400	3,687,300
Unrealized holding gain (loss)	(145,300)	(140,800)	(57,300)
Equity Securities
Fair value	154,600	151,000	154,100
Cost	118,900	118,800	102,200
Unrealized holding gain (loss)	35,700	32,200	51,900
Mutual Funds
Fair value	3,880,900	5,125,600	2,766,500
Cost	4,063,100	5,299,500	2,752,400
Unrealized holding gain (loss)	(182,200)	(173,900)	14,100
Debt Securities
Fair value	236,600	1,115,000	824,000
Cost	235,400	1,114,100	832,700
Unrealized holding gain (loss)	$ 1,200	$ (900)	$ 8,700