Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2014

Dec. 31, 2013

Accounting Policies [Abstract]

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Stock options to purchase common stock		476,671		409,488		445,804		491,609
Warrants to purchase convertible preferred stock		72,322		-		24,107		-

	Decemeber 31,
	2012		2013
Convertible preferred stock		462,331,603		462,331,603
Stock options to purchase common stock		44,788,104		45,146,118
Warrants to purchase convertible preferred stock		24,299,963		24,299,963