Note 6 - Warrants (Details) - Warrants Outstanding (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Class of Warrant or Right [Line Items]
Outstanding as of December 31, (in Shares)	10,618,771	8,390,741
Issued (in Shares)	4,150,001	2,838,329
Exercised (in Shares)	(574,288)
Expired (in Shares)	(6,111,362)	(1,275,298)
Outstanding as of June 30, (in Shares)	8,083,122	9,448,772
Minimum [Member]
Class of Warrant or Right [Line Items]
Outstanding as of December 31,	$ 0.125	$ 0.125
Issued	$ 0.25	$ 0.50
Expired	$ 0.50	$ 0.50
Outstanding as of June 30,	$ 0.125	$ 0.125
Maximum [Member]
Class of Warrant or Right [Line Items]
Outstanding as of December 31,	$ 1.00	$ 2.00
Issued	$ 1.00	$ 1.00
Expired	$ 1.00	$ 1.00
Outstanding as of June 30,	$ 1.00	$ 1.00