Income Taxes - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Allowance for loan losses	$ 311	$ 1,833
Accrued liabilities	222	286
State income taxes	51	44
Deferred compensation	475	513
Stock compensation	110	275
Net operating loss carryforward	6,141	7,341
Non-accrual loan interest	14	58
Partnership investment	125	60
General business credit	1,091	938
Alternative minimum tax credit	185	113
Other	531	33
Total deferred tax assets	9,256	11,494
Valuation allowance	(2,527)	(8,806)
Deferred tax liabilities:
Deferred loan fees/costs	(1,246)	(1,633)
Real estate owned	(15)	(86)
Basis difference on fixed assets	(59)	(80)
Net unrealized appreciation on available-for-sale securities	(164)	(222)
FHLB stock dividends	(574)	(574)
Mortgage servicing rights	(17)	(26)
Prepaid expenses	(60)	(67)
Total deferred tax liabilities	(2,135)	(2,688)
Net deferred tax assets	$ 4,594	$ 0