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9. Income Taxes (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred tax assets:    
Allowance for loan losses $ 1,535 $ 1,481
Accrued retirement expense 1,150 1,119
Restricted stock 217 262
Accrued bonuses 266 211
Interest income on nonaccrual loans 2 1
Total gross deferred tax assets 3,170 3,074
Deferred tax liabilities:    
Deferred loan fees 343 379
Accumulated depreciation 873 610
Prepaid expenses 7 10
Other 53 5
Unrealized gain on available for sale securities 1,087 294
Total gross deferred tax liabilities 2,363 1,298
Net deferred tax asset $ 807 $ 1,776