Note 10 - Common Stock and Common Stock Warrants (Details) (USD $)	1 Months Ended			6 Months Ended		12 Months Ended		6 Months Ended			12 Months Ended
	Apr. 30, 2012	Feb. 28, 2012	May 31, 2011	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Sep. 24, 2012	Jun. 30, 2013 February 2011 Stock Issuance 1 [Member]	Sep. 24, 2012 February 2012 Issuance (Member)	Sep. 24, 2012 April 2012 Issuance (Member)	Dec. 31, 2012 Warrants Issued in February and April (Member)	Dec. 31, 2012 Series B Convertible Preferred Stock (Member)	Jan. 09, 2012 Series B Convertible Preferred Stock (Member)	Jan. 09, 2012 Original Exercise Price (Member)	Jan. 09, 2012 Reduced Exercise Price (Member)
Note 10 - Common Stock and Common Stock Warrants (Details) [Line Items]
Proceeds from Issuance or Sale of Equity (in Dollars)								$ 500,000
Sale of Stock, Number of Shares Issued in Transaction (in Shares)				3,800,000
Sale of Stock, Price Per Share (in Dollars per share)				$ 0.13
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)			1,100,000				8,132,353						6,100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights			0.63				0.10		0.20	0.17				1.64	0.20
Proceeds from Warrant Exercises (in Dollars)					728,000						800,000	700,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost (in Dollars)						$ 900,000
Fair Value Assumptions, Expected Volatility Rate	110.00%	110.00%	110.00%			110.00%
Fair Value Assumptions, Risk Free Interest Rate	1.01%	0.82%	1.71%			0.01%
Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%			0.00%
Fair Value Assumptions, Expected Term	5 years	5 years	5 years			3 months
Conversion of Stock, Shares Converted (in Shares)												3,900,000