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Income Taxes - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Deferred tax assets: |  |
Allowance for loan losses |  | $ 84
Real estate owned | $ 5 |
Accrued liabilities | 173 | 218
State income taxes | 33 | 46
Deferred compensation |  | 494
Stock compensation | 182 | 156
Net operating loss carryforward | 4,367 | 5,886
Non-accrual loan interest | 4 | 9
Partnership investment | 101 | 175
General business credit | 1,458 | 1,282
Alternative minimum tax credit | 256 | 209
Other | 14 | 37
Total deferred tax assets | 6,593 | 8,596
Deferred tax liabilities: |  |
Allowance for loan losses | (276) |
Deferred loan fees/costs | (817) | (1,125)
Basis difference on fixed assets | (49) | (57)
Net unrealized appreciation on available-for-sale securities | (36) | (90)
FHLB stock dividends | (266) | (371)
Mortgage servicing rights | (7) | (13)
Prepaid expenses | (32) | (33)
Total deferred tax liabilities | (1,483) | (1,689)
Net deferred tax assets | $ 5,110 | 6,907
Valuation allowance |  |
Period for which prior cumulative losses considered in assessing the realization of deferred tax assets | 2 years |
Valuation allowance | $ 0 | $ 0

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