Income Tax Expense - Schedule of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Depreciation	$ (1,964)	$ (1,953)
Unrealized gain on securities	0	(1,840)
FHLB of Dallas stock dividends	(20)	(19)
Gross deferred tax liability	(1,984)	(3,812)
Allowance for loan losses	4,025	3,400
Allowance for operational losses	57	74
Health insurance self fund	94	211
Deferred compensation	554	570
Unrealized loss on securities	1,003	0
Equity security valuation	33	(5)
Advance payment	350	150
Accrued bonus	368	220
Other	100	139
Gross deferred tax asset	6,584	4,759
Net deferred tax asset (liability)	$ 4,600	$ 947