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Note 6 - Stockholders' Deficit - Employee Option Grants and Non-employee Option Grants (Details) - USD ($)
3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Research and Development Expense [Member]    
Allocated Share-based Compensation Expense $ 7,000 $ 3,000
General and Administrative Expense [Member]    
Allocated Share-based Compensation Expense 4,000 27,000
Allocated Share-based Compensation Expense $ 11,000 $ 30,000