Note 11 - Warrants (Details) - Summary of Warrant Activity (USD $)	1 Months Ended	6 Months Ended
	Sep. 30, 2009	Jun. 30, 2013	May 30, 2013	Feb. 26, 2013
Note 11 - Warrants (Details) - Summary of Warrant Activity [Line Items]
Warrants outstanding at December 31, 2012		7,863,653	6,294,674
Warrants outstanding at December 31, 2012 (in Dollars per Item)		3.37		1.18
Warrants exercised for common stock		(71,250)
Warrants exercised for common stock (in Dollars per share)		$ 3.25
Warrants outstanding at June 30, 2013		13,828,622	6,294,674
Warrants outstanding at June 30, 2013 (in Dollars per Item)		2.42		1.18
Weighted average remaining contractual terms (in years)	66 months	4 years
Warrant [Member]
Note 11 - Warrants (Details) - Summary of Warrant Activity [Line Items]
Warrants granted in connection with the Preferred Stock Offering, as more fully described in Note 9		6,036,219
Warrants granted in connection with the Preferred Stock Offering, as more fully described in Note 9 (in Dollars per share)		$ 1.18