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Common Stock, Preferred Stock and Dividends (Tables)
 12 Months Ended
Jun. 30, 2017
Equity [Abstract]  
Schedule of preferred shares and common shares
     
2017
    
2016
                
2017
    
2016
  
As of June 30
    
Authorized Shares
    
Par value
    
Issued and outstanding shares
  
Preferred stock
         16,000,000           16,000,000         $ 0.0001           —           —    
Common stock–Class A
         300,000,000           300,000,000         $ 0.0001           19,249,132           18,519,757    
Common stock–Class B
         30,000,000           30,000,000         $ 0.0001           20,626,836           20,887,811