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 | 
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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