Note 4 - Liability Attributable to Warrants (Tables)

3 Months Ended

Mar. 31, 2015

Warrants Liability [Abstract]

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

	Estimated Volatility			Annualized Forfeiture Rate		Expected Term (Years)		Estimated Exercise Factor		Risk-Free Interest Rate			Dividends
2011 Transaction
March 31, 2015		110	%		—		1.44		3.5		0.40	%		—
December 31, 2014		104	%		—		1.69		3.5		0.56	%		—
2014 Transaction
March 31, 2015		—			—		—		—		—			—
December 31, 2014		114	%		—		4.08		3.5		1.35	%		—
ipCapital
March 31, 2015		107	%		—		1.56		4.0		0.44	%		—
December 31, 2014		105	%		—		1.81		4.0		0.61	%		—

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Warrants liability – December 31, 2014 fair value	$	647,300
Change in fair value of warrant liability recorded in other income		55,100
Change in fair value of warrant liability recorded in general and administrative expense		(400	)
Reclassification of 2014 PIPE Warrant to Equity		(407,300	)
Warrants liability – March 31, 2015 fair value	$	294,700

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	Beginning Outstanding		Issued		Exercised		Ending Outstanding
2011 Transaction		10,302,500		—		—		10,302,500
2014 Transaction		5,650,001		—		—		5,650,001
Exercise Agreement		4,500,000		—		—		4,500,000
ipCapital		400,000		—		—		400,000
Consultant Warrant (1)		169,273		—		—		169,273
Offer to Exercise		152,500		—		—		152,500
Total		21,174,274		—		—		21,174,274

	Beginning Outstanding		Issued		Exercised		Ending Outstanding
2011 Transaction		11,302,500		—		1,000,000		10,302,500
2014 Transaction		—		5,650,001		—		5,650,001
Exercise Agreement		4,500,000		—		—		4,500,000
ipCapital		400,000		—		—		400,000
Consultant Warrant (1)		312,500		—		—		312,500
Offer to Exercise		152,500		—		—		152,500
Total		16,667,500		5,650,001		1,000,000		21,317,501