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Note 8 - Stockholders' Deficit - Employee Option Grants and Non-employee Option Grants (Details) - USD ($)
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Allocated Share-based Compensation Expense $ 40,000 $ 109,000
Research and Development Expense [Member]    
Allocated Share-based Compensation Expense 13,000 21,000
General and Administrative Expense [Member]    
Allocated Share-based Compensation Expense $ 27,000 $ 88,000