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Note I - Stock-Based Compensation (Detail) - (Table 3)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Volatility 43% to 49% 47% to 52% 49% to 52%
Risk free interest rate 0.61% to 1.78% 0.84% to 2.16% 1.39% to 2.09%
Expected life in years 2 to 4 3 to 4 3 to 4
Dividend yield 0.00% 0.00% 0.00%