Summary Of Significant Accounting Policies - Recent Accounting Pronouncements and Developments (Details) - USD ($) $ in Thousands	Jan. 01, 2021	Dec. 31, 2021	Dec. 31, 2020
RECENT ACCOUNTING PRONOUNCEMENTS
Right-of-use asset		$ 478	$ 623
Allowance for loan losses		$ 2,470	1,476
Reserve for unfunded commitments			33
Total allowance for credit losses			1,509
Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	$ 1,574
Reserve for unfunded commitments	457
Total allowance for credit losses	2,031
Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	3,050
Reserve for unfunded commitments	490
Total allowance for credit losses	3,540
Single-family | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,366
Real Estate Loan
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			781
Real Estate Loan | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,141
Real Estate Loan | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,922
Real Estate Loan | Construction And Land Development [Member]
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			10
Real Estate Loan | Construction And Land Development [Member] | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	16
Real Estate Loan | Construction And Land Development [Member] | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	26
Real Estate Loan | Farmland
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			2
Real Estate Loan | Farmland | Adjustment
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	9
Real Estate Loan | Farmland | Adjusted balance
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	11
Real Estate Loan | Single-family
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			512
Real Estate Loan | Single-family | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	854
Real Estate Loan | Multi-family
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			39
Real Estate Loan | Multi-family | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	63
Real Estate Loan | Multi-family | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	102
Real Estate Loan | Commercial
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			218
Real Estate Loan | Commercial | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	199
Real Estate Loan | Commercial | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	417
Commercial and Industrial | Adjustment
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			115
Commercial and Industrial | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	114
Commercial and Industrial | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	229
Commercial and Industrial | Commercial and industrial
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			67
Commercial and Industrial | Commercial and industrial | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	120
Commercial and Industrial | Commercial and industrial | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	187
Commercial and Industrial | SBA Guaranty
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			48
Commercial and Industrial | SBA Guaranty | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	(6)
Commercial and Industrial | SBA Guaranty | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	42
Consumer Loans
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			580
Consumer Loans | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	319
Consumer Loans | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	899
Consumer Loans | Consumer and Indirect
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			11
Consumer Loans | Consumer and Indirect | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	46
Consumer Loans | Consumer and Indirect | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	57
Consumer Loans | Automobile
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses			$ 569
Consumer Loans | Automobile | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	273
Consumer Loans | Automobile | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	842
Retained Earnings [Member] | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Total allowance for credit losses	2,031
Allowance for credit losses, tax effect	(559)
Allowance for credit losses net of tax	$ 1,472