Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2015

Dec. 31, 2014

Accounting Policies [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended
	March 31,
	2015		2014
Convertible preferred stock		-		195,062,650
Warrants to purchase convertible preferred stock		-		16,680,324
Stock options to purchase common stock		2,905,783		363,413
Warrants to purchase common stock		2,411,071		-
Rights to common stock		566,038		-

	Year Ended December 31,
	2014		2013
Convertible preferred stock		-		195,062,650
Warrants to purchase convertible preferred stock		-		16,680,324
Stock options to purchase common stock		2,291,783		363,413
Warrants to purchase common stock		1,793,887		-
Rights to common stock		566,038		-