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Fair Value Measurement (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative financial instrument asset $ 0 $ 273
Total recurring assets fair value 13,008 20,547
Derivative financial instrument liability (125) 0
Total financial liabilities (125) 0
Significant other observable inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative financial instrument asset 0 273
Total recurring assets fair value 13,008 20,547
Derivative financial instrument liability (125) 0
Total financial liabilities (125) 0
Corporate Bond Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 13,008 20,274
Corporate Bond Securities | Significant other observable inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments $ 13,008 $ 20,274