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Other Borrowings (Detail) - USD ($)
1 Months Ended 12 Months Ended
Dec. 31, 2006
Dec. 31, 2015
Dec. 31, 2013
Note 11 - Other Borrowings (Details) [Line Items]      
Annual Paydown of Principal Required   20.00%  
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds   $ 80,000,000  
Stock Issued During Period, Value, New Issues $ 248,000   $ 74,000
Notes Payable $ 8,248,000    
London Interbank Offered Rate (LIBOR) [Member]      
Note 11 - Other Borrowings (Details) [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.67%    
Mandatorily Redeemable Securities [Member] | Special Purpose Entity [Member]      
Note 11 - Other Borrowings (Details) [Line Items]      
Securities Sold under Agreements to Repurchase $ 8,000,000