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Note 5 - Stockholders' Deficit (Details 2) - USD ($)
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Allocated Share-based Compensation Expense $ 164,000 $ 11,000
Research and Development Expense [Member]    
Allocated Share-based Compensation Expense 15,000 8,000
General and Administrative Expense [Member]    
Allocated Share-based Compensation Expense $ 149,000 $ 3,000