Note 9 - Stockholders' Equity (Details) - Stock Options - Valuation Assumptions	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014
Note 9 - Stockholders' Equity (Details) - Stock Options - Valuation Assumptions [Line Items]
Volatility	76.00%	54.00%
Dividend yield	0.00%	0.00%
Risk-free interest rate	1.55%	0.95%
Expected term (years)	6 years 36 days	3 years 105 days
Minimum [Member]
Note 9 - Stockholders' Equity (Details) - Stock Options - Valuation Assumptions [Line Items]
Volatility	74.00%	49.00%
Risk-free interest rate	0.51%	0.59%
Expected term (years)	2 years	2 years 229 days
Maximum [Member]
Note 9 - Stockholders' Equity (Details) - Stock Options - Valuation Assumptions [Line Items]
Volatility	80.00%	65.00%
Risk-free interest rate	1.79%	1.69%
Expected term (years)	10 years	4 years 244 days

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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-Publisher FASB

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-Topic 718

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- Definition

Expected term of share-based compensation awards, 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 718

-SubTopic 10

-Section S99

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-Subparagraph (SAB TOPIC 14.D.2)

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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