Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

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

	June 30,
	2015		2014
Convertible preferred stock		-		195,062,650
Warrants to purchase convertible preferred stock		-		16,680,324
Stock options to purchase common stock		3,005,783		339,742
Warrants to purchase common stock		2,864,823		-