Note 9 - Warrant Derivative Liability  | 
12 Months Ended | ||||||||||||||||||||||||||||||||||||
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Jun. 30, 2017  | |||||||||||||||||||||||||||||||||||||
| Notes to Financial Statements | |||||||||||||||||||||||||||||||||||||
| Derivative Instruments and Hedging Activities Disclosure [Text Block] | 
 NOTE  
9  - Warrant Derivative Liability  
In   2012,  we issued warrants to certain investors and a consultant (together, the "2012  Warrant Holders") to purchase a total of 297,035  shares of our common stock at $4.10  per share (the "2012  Warrants").  The 2012  Warrants include exercise price re-set provisions (the "Re-set Provisions") should future equity offerings be offered at a price lower than the warrant exercise price.  In accordance with ASC No.  815,  the Re-set Provisions are recorded as derivative liabilities in the accompanying consolidated financial statements.Warrants classified as derivative liabilities are recorded at their fair values at the issuance date and are revalued at each subsequent reporting date.   June 30, 2017  and 2016  totaled approximately $14,000  and $11,000,  respectively, and is included as a component of other income (expense) in the accompanying consolidated statements of operations (see Note  . The change in the warrant derivative liability is primarily attributable to the exchange of approximately 11 )93%  of the outstanding warrants at  June 30, 2016  into shares of common stock during fiscal 2017  (see Note 8 ) and the decrease in the market value of our common stock. Additionally, on August 23, 2016,  we proposed to our 2012  Warrant Holders that the Re-set Provision included in the 2012  Warrants be eliminated.  Upon receiving consents to eliminate the Re-set Provision from a majority of the 2012  Warrant Holders, the Re-set Provision and the related derivative liability were eliminated as of  January 23, 2017.   The derivative liabilities had an average fair value per warrant and aggregate value as of  June 30, 2016  of $0.10  and $24,000,  respectively.Significant assumptions used to estimate the fair value of the warrants classified as derivative liabilities are summarized below:  
 As discussed  
in Note  
8  above, during  May 2016  we sold shares of our common stock at a price of $0.40  per share, thereby triggering an anti-dilution provision included in the warrants to purchase an aggregate of 297,035  shares of common stock upon exercise. As a result, the exercise price of such warrants was reduced to $1.55  per share. The remaining terms, including expiration dates, of all effected warrants remain unchanged. | 
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