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Note 7 - Employee Option Grants and Non-employee Option Grants (Details) - USD ($)
12 Months Ended
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