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Note 5 - Marketable Securities (Details Textual) (USD $)
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3 Months Ended | 9 Months Ended | |||
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 31, 2015
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Mar. 31, 2014
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Jun. 30, 2014
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| Marketable Securities, Gain (Loss) | $ 0us-gaap_MarketableSecuritiesGainLoss | $ 0us-gaap_MarketableSecuritiesGainLoss | $ 0us-gaap_MarketableSecuritiesGainLoss | $ 0us-gaap_MarketableSecuritiesGainLoss | |
| Other than Temporary Impairment Losses, Investments, Available-for-sale Securities | 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities | ||||
| Marketable Securities, Current | $ 6,379,000us-gaap_MarketableSecuritiesCurrent | $ 6,379,000us-gaap_MarketableSecuritiesCurrent | $ 18,153,000us-gaap_MarketableSecuritiesCurrent | ||
| X | ||||||||||
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- Definition
Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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