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Consolidated Balance Sheets (Parenthetical)
$ in Thousands
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2015
€ / shares
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2015
€ / shares
Current Assets        
Allowance for doubtful accounts | $ $ 333   $ 372  
Stockholders' Equity        
Preferred shares, par value | € / shares   € 0.01   € 0.01
Preferred shares, shares authorized 100,000,000   100,000,000  
Preferred shares, shares issued 0   0  
Preferred shares, shares outstanding 0   0  
Ordinary shares, par value | € / shares   € 0.01   € 0.01
Ordinary shares, shares authorized 100,000,000   100,000,000  
Ordinary shares, shares issued 44,080,627   44,080,627  
Ordinary shares, shares outstanding 31,437,158   33,203,065  
Treasury shares 12,643,469   10,877,562