Income Taxes - Effects of Temporary Differences of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for loan losses	$ 1,749	$ 1,354
Deferred compensation	973	1,040
Deferred commissions and fees	260	337
Impairment of other real estate owned	9	52
Federal net operating loss carryforwards		655
State net operating loss carryforwards	192	270
Federal alternative minimum tax and general business credits carryforwards	42	107
Unrealized loss on securities available-for-sale	426	71
Unrealized loss on cash flow hedges	443	1
Other	658	630
Total gross deferred tax assets	4,326	4,517
Deferred tax liabilities:
Premises and equipment	1,311	1,205
Core deposit intangible	245	347
Limited partnerships	138	135
Unrealized loss on securities available-for-sale	426	71
Other	231	79
Total gross deferred tax liabilities	2,351	1,766
Net deferred tax asset, included in other assets	$ 1,975	$ 2,751