Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Fair Value Measurements (Details Textual)

v2.4.1.9
Note 12 - Fair Value Measurements (Details Textual) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Available-for-sale Securities, Gross Unrealized Gain (Loss)   $ 0us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1   $ 0us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGainLoss1
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 0us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear 0us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear    
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities   0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities    
Impairment of Long-Lived Assets to be Disposed of 800,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf   0us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf  
Restricted Cash and Investments, Noncurrent 8,000,000us-gaap_RestrictedCashAndInvestmentsNoncurrent 8,000,000us-gaap_RestrictedCashAndInvestmentsNoncurrent   8,500,000us-gaap_RestrictedCashAndInvestmentsNoncurrent
Municipal Debt Securities, at Carrying Value $ 6,400,000us-gaap_MunicipalDebtSecuritiesAtCarryingValue $ 6,400,000us-gaap_MunicipalDebtSecuritiesAtCarryingValue   $ 18,200,000us-gaap_MunicipalDebtSecuritiesAtCarryingValue