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Note 4 - Fair Value Measurements (Detail) - Estimated Fair Value of Financial Instruments (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Financial assets:    
Cash and cash equivalents $ 52,606 $ 34,390
Investment securities    
Available for sale 179,140 193,977
Net loans 402,002 395,061
Bank-owned life insurance 8,465 8,257
Federal Home Loan Bank stock 1,887 1,887
Accrued interest receivable 2,598 2,234
Financial liabilities:    
Deposits 584,738 580,962
Short-term borrowings 6,518 7,392
Other borrowings 15,836 16,831
Accrued interest payable 557 645
Fair Value, Inputs, Level 1 [Member]
   
Financial assets:    
Cash and cash equivalents 52,606  
Investment securities    
Available for sale 5  
Bank-owned life insurance 8,465  
Federal Home Loan Bank stock 1,887  
Accrued interest receivable 2,598  
Financial liabilities:    
Deposits 382,773  
Short-term borrowings 6,518  
Accrued interest payable 557  
Fair Value, Inputs, Level 2 [Member]
   
Investment securities    
Available for sale 179,135  
Fair Value, Inputs, Level 3 [Member]
   
Investment securities    
Net loans 394,070  
Financial liabilities:    
Deposits 207,336  
Other borrowings 16,240  
Estimate of Fair Value, Fair Value Disclosure [Member]
   
Financial assets:    
Cash and cash equivalents 52,606 34,390
Investment securities    
Available for sale 179,140 193,977
Net loans 394,070 382,542
Bank-owned life insurance 8,465 8,257
Federal Home Loan Bank stock 1,887 1,887
Accrued interest receivable 2,598 2,234
Financial liabilities:    
Deposits 590,109 587,178
Short-term borrowings 6,518 7,392
Other borrowings 16,240 17,327
Accrued interest payable $ 557 $ 645