Note 11 - Share-Based Payments (Details) - Warrants Outstanding (USD $)	Sep. 24, 2012	May 31, 2011	Jun. 30, 2013 Issued (Member)	Jun. 30, 2013 Exercised (Member)	Jun. 30, 2013 Expired (Member)	Dec. 31, 2012 Beginning Balance (Member)	Jun. 30, 2013 Ending Balance (Member)
Class of Warrant or Right [Line Items]
Warrants outstanding at December 31, 2012						25,115,796	21,718,914
Warrants outstanding at December 31, 2012 (in Dollars per Item)	0.10	0.63				1.64	1.42
Issued			0
Issued (in Dollars per share)			$ 0
Exercised				0
Exercised (in Dollars per share)				$ 0
Expired					(3,396,882)
Expired (in Dollars per share)					$ 3.07
Warrants outstanding at June 30, 2013						25,115,796	21,718,914
Warrants outstanding at June 30, 2013 (in Dollars per Item)	0.10	0.63				1.64	1.42