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Note 8 - Assumptions to Estimate Fair Value of the Warrants (Details) - $ / shares | 12 Months Ended |
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Jun. 30, 2016 | Jun. 30, 2015 | May 31, 2016
Minimum [Member] |  |  |
Risk-free interest rate | 0.44% | 0.62% |
Expected life (average) (years) |  | 1 day |
Share Price |  | $ 0.05 |
Exercise price (in dollars per share) |  | $ 0.15 |
Expected volatility |  | 110.00% |
Maximum [Member] |  |  |
Risk-free interest rate | 0.49% | 0.76% |
Expected life (average) (years) |  | 2 days |
Share Price |  | $ 0.05 |
Exercise price (in dollars per share) |  | $ 0.27 |
Expected volatility |  | 100.00% |
Share Price | $ 0.05 |  | $ 0.04
Expected volatility | 110.00% |  |

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- Definition Agreed upon price for the exchange of the underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Risk-free interest rate assumption used in valuing an instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
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