Fair Value of Financial Instruments (Details 1) - USD ($)	Mar. 31, 2022	Jun. 30, 2021
Fair value	$ 7,768,600	$ 3,744,600
Cost	7,804,400	3,687,300
Unrealized holding gain (loss)	(35,800)	57,300
Equity Securities
Fair value	176,900	154,100
Cost	118,900	102,200
Unrealized holding gain (loss)	58,000	51,900
Mutual Funds
Fair value	6,619,600	2,766,500
Cost	6,708,300	2,752,400
Unrealized holding gain (loss)	(88,700)	14,100
Debt Securities
Fair value	972,100	824,000
Cost	977,200	832,700
Unrealized holding gain (loss)	$ (5,100)	$ 8,700