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Note Q - Stock-Based Compensation (Detail) - (Table 4)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Volatility 47.1% to 47.4% 47.6% to 48.7%
Risk free interest rate 0.52% to 0.87% 1.43% to 1.63%
Expected life in years 4.1 to 4.6 3.4 to 4.4
Dividend yield 0.00% 0.00%