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Note 8 - Stock-Based Compensation (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2011
Mar. 31, 2013
Salaries, Wages, and Related Expenses [Member]
Mar. 31, 2012
Salaries, Wages, and Related Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   800,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 195,836      
Allocated Share-based Compensation Expense (in Dollars)     $ 0.2 $ 0.2
Shares Paid for Tax Withholding for Share Based Compensation 33,243      
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased (in Dollars per share) $ 6.03      
Adjustments Related to Tax Withholding for Share-based Compensation (in Dollars) $ 0.2