Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets
Allowance for loan losses	$ 3,288	$ 3,125
Deferred compensation	824	786
Unrealized losses on securities available for sale	4,087	1,774
Realized losses in other than temporary impairment charge	336	334
Foreclosed real estate write-downs	2,377	2,350
Interest income on non-accrual loans	1,425	1,185
Net operating loss carryforward	8,896	10,775
Other	2,001	1,580
Total deferred tax assets	23,234	21,909
Deferred tax liabilities
Deferred loan costs	1,313	1,029
Other	528	672
Total deferred tax liabilities	1,841	1,701
Net deferred tax asset before valuation allowance	21,393	20,208
Less: valuation allowance	(12,214)	(13,722)
Net deferred tax asset	$ 9,179	$ 6,486