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Note 14 - Derivative Financial Instruments (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Apr. 05, 2016
Sep. 30, 2016
Jun. 30, 2016
Sep. 30, 2016
Dec. 31, 2014
Dec. 31, 2015
FUSB [Member] | Operating Segments [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]            
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net   $ 0   $ 0    
Derivative, Notional Amount $ 10,000,000          
Derivative, Term of Contract 7 years          
Derivative, Fixed Interest Rate 1.46%          
FUSB [Member] | Operating Segments [Member] | Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member]            
Derivative, Notional Amount         $ 40,000,000  
Payments of Derivative Issuance Costs         $ 126,000  
Derivative, Fair Value, Net     $ 0      
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net     $ 3,000      
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss), Net of Tax   82,000   82,000    
Accumulated Other Comprehensive Income (Loss), Net of Tax   $ 1,169,000   $ 1,169,000   $ 536,000