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