Note 8 - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan loss	$ 8,581	$ 8,029
Deferred compensation	5,589	5,730
Accrued expenses	1,360	1,515
Investments in partnerships	905	1,177
Write-downs and costs associated with other real estate owned	29	435
Loans	685	659
Other-than-temporary impairment	37	347
Other assets	185	187
Total deferred tax assets	17,371	18,079
Securities	438	1,655
Property and equipment	1,409	1,158
Loan costs	923	843
Prepayment penalty on modification of FHLB advances
Mortgage servicing rights	280	315
Leases	381	611
Core deposit intangible	502	573
Other liabilities	408	473
Total deferred tax liabilities	4,341	5,628
Valuation allowance	134	86
Net deferred tax asset	$ 12,896	$ 12,365