Loans - Summary of Internal Risk Ratings of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 310,338	$ 254,612
Real estate loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	267,443	223,969
Real estate loans [Member] | One To Four Family [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	152,780	127,755
Real estate loans [Member] | Multifamily [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,059	3,729
Real estate loans [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	91,432	76,967
Real estate loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	20,172	15,518
Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	33,644	24,212
Consumer Loans [Member] | Home Equity Loans And Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,528	3,717
Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,723	2,714
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	304,821	248,789
Pass [Member] | Real estate loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	262,203	218,534
Pass [Member] | Real estate loans [Member] | One To Four Family [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	152,470	127,513
Pass [Member] | Real estate loans [Member] | Multifamily [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,059	3,729
Pass [Member] | Real estate loans [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	86,502	71,774
Pass [Member] | Real estate loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	20,172	15,518
Pass [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	33,367	23,824
Pass [Member] | Consumer Loans [Member] | Home Equity Loans And Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,528	3,717
Pass [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,723	2,714
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,839	2,073
Special Mention [Member] | Real estate loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,740	1,969
Special Mention [Member] | Real estate loans [Member] | One To Four Family [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Special Mention [Member] | Real estate loans [Member] | Multifamily [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Special Mention [Member] | Real estate loans [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,740	1,969
Special Mention [Member] | Real estate loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Special Mention [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	99	104
Special Mention [Member] | Consumer Loans [Member] | Home Equity Loans And Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Special Mention [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,678	3,750
Substandard [Member] | Real estate loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,500	3,466
Substandard [Member] | Real estate loans [Member] | One To Four Family [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	310	242
Substandard [Member] | Real estate loans [Member] | Multifamily [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Substandard [Member] | Real estate loans [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	3,190	3,224
Substandard [Member] | Real estate loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Substandard [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	178	$ 284
Substandard [Member] | Consumer Loans [Member] | Home Equity Loans And Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Substandard [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Real estate loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Real estate loans [Member] | One To Four Family [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Real estate loans [Member] | Multifamily [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Real estate loans [Member] | Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Real estate loans [Member] | Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Commercial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Consumer Loans [Member] | Home Equity Loans And Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	0
Doubtful [Member] | Consumer Loans [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 0