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Warranty Liability (Tables)
9 Months Ended
Mar. 31, 2021
Product Warranties Disclosures [Abstract]  
Schedule of changes in warranty liability

Changes in the Company’s warranty liability were approximately as follows:

 

   Nine Months Ended March 31, 2021   Fiscal Year Ended June 30, 2020 
Warranty reserve, beginning   $740,000   $810,000 
Accrual for products sold   127,500    79,000 
Expenditures and costs incurred for warranty claims   (127,500)   (149,000)
Warranty reserve, ending   $740,000   $740,000