Note 9 - Shareholders' Equity (Detail) - Stock Purchase Warrants (USD $)	12 Months Ended
	Dec. 31, 2012
Warrants	$ 22,332,623
Series 1 [Member] | $2.41 [Member]
Warrants	5,200,519
Exercise Price (in Dollars per Item)	2.41
Expiration Date	Jun. 30, 2014
Series 1 [Member] | $2.52 [Member]
Warrants	460,976
Exercise Price (in Dollars per Item)	2.52
Expiration Date	Jun. 30, 2014
Series 3 [Member] | $2.46 [Member]
Warrants	$ 16,671,128
Exercise Price (in Dollars per Item)	2.46
Expiration Date	Aug. 31, 2014