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Inventories (Details) - USD ($)
Dec. 31, 2020
Jun. 30, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 4,094,767 $ 3,876,955
Work in process 3,390,968 2,989,070
Finished goods 3,302,822 3,134,800
Allowance for obsolescence (1,095,280) (1,016,343)
Inventories, net $ 9,693,277 $ 8,984,482