Note 8 - Shareholders' Equity (Details) - Stock Purchase Warrants (USD $)	3 Months Ended
	Mar. 31, 2013
Class of Warrant or Right [Line Items]
Warrants	$ 22,332,623
Series 1 [Member] | $2.40 [Member]
Class of Warrant or Right [Line Items]
Warrants	5,200,519
Exercise Price (in Dollars per Item)	2.40
Expiration Date	Jun. 30, 2014
Series 1 [Member] | $2.51 [Member]
Class of Warrant or Right [Line Items]
Warrants	460,976
Exercise Price (in Dollars per Item)	2.51
Expiration Date	Jun. 30, 2014
Series 3 [Member] | $2.45 [Member]
Class of Warrant or Right [Line Items]
Warrants	$ 16,671,128
Exercise Price (in Dollars per Item)	2.45
Expiration Date	Aug. 31, 2014