Note 5 - Loans and Leases - Non-performing Loans and Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 13, 2016
Dec. 31, 2015
Non-accrual loans and leases $ 8,363 $ 8,363 $ 10,244
Originated Loans [Member]      
Non-accrual loans and leases 5,168   7,118
Acquired Loans [Member]      
Non-accrual loans and leases 3,195   3,126
Real Estate Portfolio Segment [Member] | Commercial Mortgage [Member]      
Non-accrual loans and leases 320 320 829
Real Estate Portfolio Segment [Member] | Commercial Mortgage [Member] | Originated Loans [Member]      
Non-accrual loans and leases 265   279
Real Estate Portfolio Segment [Member] | Commercial Mortgage [Member] | Acquired Loans [Member]      
Non-accrual loans and leases 55   550
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]      
Non-accrual loans and leases 2,289 2,289 2,027
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Originated Loans [Member]      
Non-accrual loans and leases 2,169   1,788
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Acquired Loans [Member]      
Non-accrual loans and leases 120   239
Real Estate Portfolio Segment [Member] | Residential Mortgage Loan [Member]      
Non-accrual loans and leases 2,658 2,658 3,212
Real Estate Portfolio Segment [Member] | Residential Mortgage Loan [Member] | Originated Loans [Member]      
Non-accrual loans and leases 1,654   1,964
Real Estate Portfolio Segment [Member] | Residential Mortgage Loan [Member] | Acquired Loans [Member]      
Non-accrual loans and leases 1,004   1,248
Real Estate Portfolio Segment [Member] | Construction Loans [Member]      
Non-accrual loans and leases 34
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Originated Loans [Member]      
Non-accrual loans and leases   34
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Acquired Loans [Member]      
Non-accrual loans and leases  
Commercial Portfolio Segment [Member]      
Non-accrual loans and leases 2,957 2,957 4,133
Commercial Portfolio Segment [Member] | Originated Loans [Member]      
Non-accrual loans and leases 941   3,044
Commercial Portfolio Segment [Member] | Acquired Loans [Member]      
Non-accrual loans and leases 2,016   1,089
Consumer Portfolio Segment [Member]      
Non-accrual loans and leases 2 2
Consumer Portfolio Segment [Member] | Originated Loans [Member]      
Non-accrual loans and leases 2  
Consumer Portfolio Segment [Member] | Acquired Loans [Member]      
Non-accrual loans and leases  
Finance Leases Portfolio Segment [Member]      
Non-accrual loans and leases 137 $ 137 9
Finance Leases Portfolio Segment [Member] | Originated Loans [Member]      
Non-accrual loans and leases $ 137   $ 9