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Concentrations and Risks (Details) - USD ($)
3 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2019
Concentration and Risks (Textual)      
Cash balance $ 37,612,582   $ 35,330,676
Total sales [Member] | Customer Four [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 10.00%    
Total sales [Member] | Customer Five [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 10.00%    
Total sales [Member] | Customer One [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 14.00% 14.00%  
Total sales [Member] | Customer Two [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 12.00% 14.00%  
Total sales [Member] | Customer Three [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 11.00% 14.00%  
Total sales [Member] | Customer Four [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage   12.00%  
Total sales [Member] | Customer Five [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage   11.00%  
Accounts Receivable [Member] | Customer One [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 39.00%    
Accounts Receivable [Member] | Customer Two [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 39.00%    
Total purchases [Member] | Vendor One [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 39.00% 38.00%  
Total purchases [Member] | Vendor Two [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 16.00% 14.00%  
Total purchases [Member] | Vendor Three [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 12.00% 11.00%  
China [Member]      
Concentration and Risks (Textual)      
Cash balance $ 37,591,678   $ 35,311,106
China [Member] | Assets, Total [Member]      
Concentration and Risks (Textual)      
Concentration risk, percentage 100.00% 100.00%