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Foreign Operations (Details) - USD ($)
Jun. 30, 2018
Jun. 30, 2017
Assets $ 47,117,114 $ 46,672,214
CHINA    
Assets 14,700,000 14,000,000
Net assets 12,600,000 12,300,000
LATVIA    
Assets 6,400,000 6,100,000
Net assets $ 5,900,000 $ 6,000,000