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8. Income Taxes (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:    
Allowance for loan losses $ 1,481 $ 1,463
Accrued retirement expense 1,119 1,073
Federal credit carryforward 0 88
Restricted stock 262 243
Accrued bonuses 211 171
Interest income on nonaccrual loans 1 5
Other than temporary impairment 0 9
Total gross deferred tax assets 3,074 3,052
Deferred tax liabilities:    
Deferred loan fees 379 365
Accumulated depreciation 610 498
Prepaid expenses 10 14
Other 5 28
Unrealized gain on available for sale securities 294 1,072
Total gross deferred tax liabilities 1,298 1,977
Net deferred tax asset $ 1,776 $ 1,075