Note 8 - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan loss	$ 5,422	$ 8,581
Deferred compensation	4,148	5,589
Accrued expenses	798	1,360
Deferred Tax Assets, Equity Method Investments	565	905
Write-downs and costs associated with other real estate owned	39	29
Loans	442	685
Other-than-temporary impairment		37
Securities	121
Other assets	186	185
Total deferred tax assets	11,721	17,371
Securities		438
Property and equipment	764	1,409
Loan costs	588	923
Mortgage servicing rights	161	280
Leases	149	381
Core deposit intangible	267	502
Other liabilities	260	408
Total deferred tax liabilities	2,189	4,341
Valuation allowance	(326)	(134)
Net deferred tax asset	$ 9,206	$ 12,896