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The components of inventory were as follows (Details) - USD ($)
Mar. 31, 2023
Jun. 30, 2022
Inventory Disclosure [Abstract]    
Parts inventory $ 2,908,000 $ 2,672,000
Work in process 213,000 100,000
Finished goods 280,000 469,000
Estimated inventory to be returned 263,000 228,000
Less: Reserve for obsolescence (213,000) (291,000)
Total $ 3,451,000 $ 3,178,000