Note 13 - Stock-Based Compensation (Detail) - Fair Value Assumption	1 Months Ended		12 Months Ended
	Sep. 30, 2010	Feb. 28, 2010	Dec. 31, 2012 2012 Omnibus Incentive Plan [Member]	Dec. 31, 2012 2006 Stock Incentive Plan [Member]	Dec. 31, 2011 2006 Stock Incentive Plan [Member]	Dec. 31, 2010 2006 Stock Incentive Plan [Member]
2012
Risk-free interest rate:	0.87%	3.24%	0.64%	0.80%	1.31%	1.86%
Expected term (in years):	3 years	6 years	5 years 255 days	6 years	6 years	5 years 292 days
Expected volatility:	79.02%	105.70%	84.00%	82.00%	83.00%	89.00%