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Note 15 - Employee Benefit Plans (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 570,000 $ 573,000 $ 430,000  
Defined Benefit Plan, Other Costs   $ 466,000 $ 299,000 $ 37,000