Note 10 - Fair Value Measurement (Detail) - Fair Value Assumptions	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Dividend yield	0.00%	0.00%
Conversion Feature Liability [Member] | Minimum [Member]
Expected life	3 months	1 year 3 months
Conversion Feature Liability [Member] | Maximum [Member]
Expected life	350 days	1 year 350 days
Warrant Liability [Member] | Minimum [Member]
Expected life	240 days	58 days
Warrant Liability [Member] | Maximum [Member]
Expected life	3 years 3 months	4 years 3 months
Minimum [Member]
Risk free interest rate	0.18%	0.11%
Expected volatility	218.20%	179.70%
Maximum [Member]
Risk free interest rate	0.36%	0.39%
Expected volatility	259.10%	261.00%