Note 9 - Warrant Derivative Liability - Assumptions to Estimate Fair Value of Warrants (Details) - $ / shares |
12 Months Ended | ||
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Jun. 30, 2016 |
Jun. 30, 2017 |
May 31, 2016 |
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| Stock price (based on prices on valuation date) (in dollars per share) | $ 0.50 | $ 0.43 | $ 0.40 |
| Exercise price (in dollars per share) | $ 1.55 | ||
| Expected volatility | 110.00% | ||
| Minimum [Member] | |||
| Risk-free interest rate | 0.44% | ||
| Expected life (average) (Year) | 350 days | ||
| Maximum [Member] | |||
| Risk-free interest rate | 0.49% | ||
| Expected life (average) (Year) | 1 year 120 days |
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- Definition Agreed upon price for the exchange of the underlying asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
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- Details
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- Details
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