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Foreign Operations (Details) - USD ($)
Jun. 30, 2021
Jun. 30, 2020
Assets $ 54,610,990 $ 47,574,918
CHINA    
Assets 20,100,000 19,000,000
Net assets 16,600,000 16,200,000
LATVIA    
Assets 11,300,000 9,800,000
Net assets $ 9,000,000 $ 8,200,000