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8. Income Taxes (Details 2) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Allowance for loan losses | $ 2,717 | $ 3,513
Accrued retirement expense | 1,616 | 1,574
Other real estate | 0 | 33
Federal credit carryforward | 326 | 0
State credit carryforward | 14 | 0
Restricted stock | 745 | 417
Accrued bonuses | 216 | 238
Interest income on nonaccrual loans | 27 | 88
Other than temporary impairment | 14 | 374
Other | 23 | 16
Total gross deferred tax assets | 5,698 | 6,253
Deferred tax liabilities: |  |
Deferred loan fees | 797 | 588
Accumulated depreciation | 532 | 172
Prepaid expenses | 78 | 59
Other | 23 | 70
Unrealized gain on available for sale securities | 1,807 | 3,308
Total gross deferred tax liabilities | 3,237 | 4,197
Net deferred tax asset | $ 2,461 | $ 2,056

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