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Note 6 - Equity-Based Compensation (Detail) - Binomial Option-Pricing Model Assumptions (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Range Start [Member]
   
Volatility 47.00%  
Risk-free rate 2.30%  
Range [Domain]
   
Volatility   50.40%
Expected term (years) 7.0 7.0
Dividend yield 0.00% 0.00%
Risk-free rate   3.10%
Range End [Member]
   
Volatility 50.60%  
Risk-free rate 3.00%  
Weighted Average [Member]
   
Weighted average grant-date fair value (in Dollars per share) 11.61 10.56
Volatility 50.40% 50.40%
Expected term (years) 7.0 7.0
Dividend yield 0.00% 0.00%
Risk-free rate 2.80% 3.10%