Note 10 - Fair Value Measurement (Detail) - Fair Value Assumptions	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Risk free interest rate	0.16%
Dividend yield	0.00%	0.00%
Conversion Feature Liability [Member] | Minimum [Member]
Expected life	259 days	3 months
Conversion Feature Liability [Member] | Maximum [Member]
Expected life	2 years 277 days	350 days
Warrant Liability [Member] | Minimum [Member]
Expected life	6 months	240 days
Warrant Liability [Member] | Maximum [Member]
Expected life	3 years	3 years 3 months
Minimum [Member]
Risk free interest rate		0.18%
Expected volatility	228.70%	218.20%
Maximum [Member]
Risk free interest rate		0.36%
Expected volatility	253.90%	259.10%