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NOTE 5 - INVENTORIES - Inventories (Details) - USD ($)
Jun. 30, 2021
Jun. 30, 2020
Inventory Disclosure [Abstract]    
Purchased parts, components and supplies $ 1,393,329 $ 1,544,036
Work-in-process 270,090 104,734
Inventories $ 1,663,419 $ 1,648,770