Note 8 - Shareholders' Equity (Details) - Stock Purchase Warrants (USD $)	9 Months Ended
	Sep. 30, 2013
Class of Warrant or Right [Line Items]
Warrants	$ 22,332,623
$2.40 [Member] | Series 1 [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
$2.51 [Member] | Series 1 [Member]
Class of Warrant or Right [Line Items]
Warrants	460,976
Exercise Price (in Dollars per Item)	2.51
Expiration Date	Jun. 30, 2014
$2.45 [Member] | Series 3 [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