Note 10 - Convertible Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

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

					Number of
					Shares
	Series				Outstanding		Fair Value
	Exercisable	Expiration	Exercise		Under		December 31,
Issuance Date	for	Date	Price		Warrants		2013
December 2008	Series A	December 2, 2018	$	0.61		196,721	$	44,000
April 2009	Series A	April 2, 2019		0.61		245,900		58,000
November 2010	Series A	November 19, 2020		0.61		163,934		47,000
May 2011	Series B	May 6, 2021		0.05		2,000,000		54,000
June 2011	Series B	June 30, 2021		0.05		4,000,000		108,000
September 2011	Series B	September 9, 2021		0.05		4,000,000		108,000
November 2011	Series B	November 30, 2021		0.05		1,000,000		28,000
December 2011	Series B	December 19, 2021		0.05		1,000,000		28,000
January 2012	Series B	January 31, 2022		0.05		910,445		28,000
February 2012	Series B	February 28, 2022		0.05		738,535		23,000
April 2012	Series B	April 16, 2022		0.05		2,351,019		73,000
April 2012	Series A	April 19, 2022		0.61		73,770		25,000
						16,680,324	$	624,000