Note 7 - Stock-Based Compensation (Details) - Jun. 30, 2015 - USD ($)	Total
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Vested Outstanding Number (in Shares)	6,757,047
Share Based Compensation Arrangement By Share Based Payment Award Options Expected To Vest Outstanding Number (in Shares)	2,928,793
Share Based Compensation Arrangement By Share Based Payment Award Options Expected To Be Forfeited (in Shares)	35,341
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	24 months
Employee Stock Option [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars)	$ 244,200
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	9 months
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	33 months
Restricted Stock [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	33 months
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	$ 498,100

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As of the balance sheet date, the number of shares into which fully expected to be forfeited stock options.

+ References

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As of the balance sheet date, the number of shares into which fully vested stock options outstanding can be converted under the option plan.

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Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)

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

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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