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Summary of Significant Accounting Policies (Details)
shares in Millions
 3 Months Ended
Oct. 19, 2015
Sep. 30, 2015
USD ($)
Segment
shares
Sep. 30, 2014
USD ($)
shares
Jun. 30, 2015
USD ($)
Summary Of Significant Accounting Policies        
Foreign currency transaction gain (loss), realized   $ (200,000) $ (100,000)  
Derivative instruments, gain (loss) realized in income, net   (9,000) 300,000  
Bad debt expenses   0 0  
Inventory valuation reserves   $ 200,000   $ 300,000
Product return period   30 days    
Percentage of products can be returned for a full refund by terminated distributors (up to)   30.00%    
Percent of restocking fee   10.00%    
Reserve for sales returns   $ 100,000   100,000
Research and development   200,000 500,000  
Income tax expenses   $ 640,000 $ 2,444,000  
Effective tax rate   37.50%    
Statutory tax rate   35.00%    
Antidilutive securities excluded from EPS calculation (in shares) | shares   0.5 0.3  
Number of operating segments | Segment   1    
Number of geographic segments | Segment   2    
Japan        
Summary Of Significant Accounting Policies        
Long-lived assets   $ 1,400,000   1,500,000
United States        
Summary Of Significant Accounting Policies        
Long-lived assets   6,100,000   $ 6,500,000
Cash Accounts Held Primarily At One Financial Institution        
Summary Of Significant Accounting Policies        
Concentration of credit risk   11,200,000    
Cash Accounts Held At Other Financial Institutions        
Summary Of Significant Accounting Policies        
Concentration of credit risk   $ 2,500,000    
Subsequent Event        
Summary Of Significant Accounting Policies        
Stock split conversion ratio 0.1429