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Note 2 - Fair Value of Financial Instruments (Detail) - Fair Value Measurements (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Dec. 31, 2010
Financial Assets:        
Cash and cash equivalents $ 61,847 $ 51,630 $ 59,289 $ 59,751
Cash and cash equivalents 61,847 51,630    
Securities available for sale 103,489 85,670    
Securities available for sale 103,489 85,670    
Securities held to maturity 23,678 22,848    
Securities held to maturity 24,311 22,847    
Federal Home Loan Bank stock 6,281 6,281    
Loans 554,350 590,964    
Loans 577,280 599,782    
Accrued interest receivable 2,396 2,872    
Accrued interest receivable 2,396 2,872    
Financial liabilities:        
Deposits 676,699 687,886    
Deposits 678,646 690,607    
Other borrowed funds 20,098 20,296    
Other borrowed funds 20,558 20,565    
Subordinated debentures 13,500 13,500    
Subordinated debentures 10,225 11,085    
Accrued interest payable 1,358 1,894    
Accrued interest payable $ 1,358 $ 1,894