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Foreign Operations (Details) - USD ($)
Jun. 30, 2019
Jun. 30, 2018
Assets $ 45,973,180 $ 47,117,114
CHINA    
Assets 16,900,000 14,700,000
Net assets 14,500,000 12,600,000
LATVIA    
Assets 8,200,000 6,400,000
Net assets $ 7,800,000 $ 5,900,000