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Note 7 - Stockholders' Deficit (Tables) | 12 Months Ended
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Jun. 30, 2016
Notes Tables |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
|  | Number |  |  | Weighted Average Exercise Price Per Share |  |  | Remaining Contract Term (# years) |
Shares purchaseable under outstanding warrants at June 30, 2014 |  |  | 22,798,347 |  |  | $ | 1.21 |  |  | 1.95 | - | 3.70 |
Stock purchase warrants issued |  |  | 5,241,749 |  |  | $ | 0.22 |  |  | 1.53 | - | 2.54 |
Stock purchase warrants exercised |  |  | - |  |  | $ | - |  |  |  |  |  |
Shares purchasable under outstanding warrants at June 30, 2015 |  |  | 28,040,096 |  |  | $ | 0.21 |  |  | 1.53 | – | 3.70 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contract Term (# years) |
Outstanding at June 30, 2015 |  |  | 6,101,357 |  |  | $ | 0.16 |  |  |  |  |
Granted |  |  | 4,385,000 |  |  | $ | 0.05 |  |  |  |  |
Exercised |  |  | - |  |  |  |  |  |  |  |  |
Forfeited and cancelled |  |  | (1,482,337 | ) |  | $ | 0.12 |  |  |  |  |
Outstanding at June 30, 2016 |  |  | 9,004,020 |  |  | $ | 0.11 |  |  |  | 7.55 |
Exercisable at June 30, 2016 |  |  | 6,525,902 |  |  | $ | 0.13 |  |  |  | 6.95 |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contract Term (# years) |
Outstanding at June 30, 2014 |  |  | 6,335,695 |  |  | $ | 0.19 |  |  |  | 8.04 |
Granted |  |  | 400,000 |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  |  |  |  |  |  |  |
Forfeited and cancelled |  |  | (634,338 | ) |  |  |  |  |  |  |  |
Outstanding at June 30, 2015 |  |  | 6,101,357 |  |  | $ | 0.16 |  |  |  | 7.48 |
Exercisable at June 30, 2015 |  |  | 4,749,859 |  |  | $ | 0.16 |  |  |  | 7.25 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
Years ended June 30, |  | 2016 |  |  | 2015 |
Research and development |  | $ | 21,000 |  |  | $ | 12,000 |
General and administrative |  |  | 88,000 |  |  |  | 225,000 |
Total stock-based compensation expense |  | $ | 109,000 |  |  | $ | 237,000 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2016 |  | 2015 |  |
Expected volatility |  |  | 100% |  |  |  |  |  | 100 | % |
Risk free interest rate |  |  | 1.31% |  |  |  |  |  | 0.96 | % |
Forfeiture rate |  | 17% | - | 24% |  |  |  |  | 17 | % |
Dividend yield |  |  | 0% |  |  |  |  |  | 0 | % |
Expected term (years) |  |  | 3 |  |  |  |  |  | 3 |  |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057994&loc=d3e25284-112666 + Details
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