Note 6 - Warrants (Details) - Warrants Outstanding	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Class of Warrant or Right [Line Items]
Outstanding	10,389,132	8,531,507	10,618,771	8,390,741
Issued	3,276,667	1,366,664
Issued	$0.30	$0.55
Expired	(3,506,306)	(1,225,898)
Expired		$1.00
Minimum [Member]
Class of Warrant or Right [Line Items]
Outstanding	0.125	0.125	0.125	0.125
Expired	0.5
Maximum [Member]
Class of Warrant or Right [Line Items]
Outstanding	1.00	1.00	1.00	1.00
Expired	1.00