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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Federal: |  |
Current | $ 1,898 | $ 2,343
Deferred | 275 | (129)
Revaluation of net deferred tax asset | 517 | 0
State: |  |
Current | 77 | 80
Deferred, net of valuation allowance | 102 | 254
Income tax expense | $ 2,869 | $ 2,548

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