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Note 7 - Employee Option Grants and Non-employee Option Grants (Details) - USD ($) | 12 Months Ended
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Jun. 30, 2016 | Jun. 30, 2015
Research and Development Expense [Member] |  |
Allocated Share-based Compensation Expense | $ 21,000 | $ 12,000
General and Administrative Expense [Member] |  |
Allocated Share-based Compensation Expense | 88,000 | 225,000
Allocated Share-based Compensation Expense | $ 109,000 | $ 237,000

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