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Note 7 - Other Real Estate Owned (Details Textual)
$ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Residential Portfolio Segment [Member] | Real Estate Loan [Member]    
Number of Foreclosed Real Estate Held 1  
Repossessed Assets, Total $ 0.6  
Taxi Medallion Portfolio Segment [Member]    
Number of Foreclosed Assets Held 1  
Other Repossessed Assets $ 0.1  
Consumer Portfolio Segment [Member]    
Mortgage Loans in Process of Foreclosure, Amount $ 10.3 $ 10.5