Note 7 - Preferred Stock - Allocation of Net Proceeds from Preferred Stock Financing (Details) - USD ($)	6 Months Ended
Jun. 30, 2015
Series C Convertible Preferred Stock [Member]
Net proceeds after transaction costs	$ 2,679,809
Less: Fair value of warrants (recorded to Additional Paid-in Capital)	(1,695,868)
Recorded value of Series C Preferred Shares at June 30, 2015	983,941
Net proceeds after transaction costs	$ 2,679,809

Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Topic 505

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-Section S99

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Warrant

-URI http://asc.fasb.org/extlink&oid=6528364

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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