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Summary of Significant Accounting Policies (Schedule of Available-for-sale Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Jun. 30, 2015
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 4,275 $ 4,770
Available-for-sale Securities 4,275 4,770
Money market funds    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 4,275 4,770
Available-for-sale Securities 4,275 4,770
Cash Equivalents    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 4,275 4,770
Available-for-sale Securities $ 4,275 $ 4,770