Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) (USD $)
3 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Fair Value, Measurements, Recurring
Dec. 31, 2012
Fair Value, Inputs, Level 1
Fair Value, Measurements, Recurring
Jun. 30, 2012
Fair Value, Inputs, Level 1
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents     $ 31,704,000 $ 41,215,000
Cash   1,600,000    
Cash equivalents   $ 30,100,000    
Cash Equivalent, Maturity Period 90 days