Note 3 - Available-For-Sale Investments (Details Textual) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2013 |
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| Chemo Centryx, Inc. [Member] | |||
| Class of Warrant or Right, Outstanding | 150,000 | ||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 20 | ||
| Warrants and Rights Outstanding | $ 52.3 | $ 37.1 | |
| Percentage of Ownership Interests | 14.00% | ||
| Available-for-sale Securities, Gross Unrealized Gain, Accumulated InInvestments | $ 22.8 | 7.6 | |
| Proceeds from Sale and Maturity of Available-for-sale Securities | $ 13.5 | $ 289.0 | $ 104.0 |
| X | ||||||||||
- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. No definition available.
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| X | ||||||||||
- Definition Represents the percentage of ownership interests. No definition available.
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| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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