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Changes in the Company’s warranty reserve were as follows: (Details) - USD ($)
9 Months Ended 12 Months Ended
Mar. 31, 2023
Jun. 30, 2022
Guarantees and Product Warranties [Abstract]    
Warranty reserve, beginning $ 1,256,000 $ 940,000
Accrual for products sold 290,000 494,000
Expenditures and costs incurred for warranty claims (213,000) (178,000)
Warranty reserve, ending $ 1,333,000 $ 1,256,000