Loans Receivable - Financing Receivables, Summary of loans by type and risk category (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	$ 42,228
2022	259,502
2021	260,728
2020	203,112
2019	96,247
Prior	338,961
Total Loans	1,200,778	$ 1,182,310
Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		1,182,159
One to four family residential [Member] | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	18,166
2022	155,300
2021	102,559
2020	67,545
2019	34,995
Prior	104,095
Total Loans	482,660
Multifamily | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	1,097
2022	7,579
2021	23,088
2020	43,936
2019	29,609
Prior	38,023
Total Loans	143,332
Commercial Real Estate | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	12,083
2022	35,346
2021	87,044
2020	80,159
2019	23,657
Prior	170,616
Total Loans	408,905
Construction Loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	(131)
2022	25,583
2021	34,813
2020	2,931
2019	407
Prior	0
Total Loans	63,603
Business Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	71
2022	4,918
2021	495
2020	1,672
2019	1,724
Prior	22,779
Total Loans	31,659
Consumer Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	10,942
2022	30,776
2021	12,729
2020	6,869
2019	5,855
Prior	3,448
Total Loans	70,619
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	42,228
2022	259,502
2021	256,342
2020	193,802
2019	94,878
Prior	279,498
Total Loans	1,126,250
Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		1,110,622
Pass | Business Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	71
2022	4,918
2021	495
2020	1,672
2019	1,724
Prior	22,779
Total Loans	31,659
Pass | Consumer Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	10,942
2022	30,776
2021	12,528
2020	6,869
2019	5,781
Prior	3,448
Total Loans	70,344
Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	4,185
2020	8,783
2019	26
Prior	8,843
Total Loans	21,837
Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		18,276
Watch | Business Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Watch | Consumer Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	26
Prior	0
Total Loans	26
Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	48
Prior	5,667
Total Loans	5,715
Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		5,894
Special mention | One to four family residential [Member] | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	1,016
Total Loans	1,016
Special mention | Multifamily | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Special mention | Commercial Real Estate | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	4,651
Total Loans	4,651
Special mention | Construction Loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Special mention | Business Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Special mention | Consumer Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	48
Prior	0
Total Loans	48
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	201
2020	527
2019	1,295
Prior	44,953
Total Loans	46,976
Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		47,367
Substandard | One to four family residential [Member] | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Substandard | Multifamily | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	1,620
Total Loans	1,620
Substandard | Commercial Real Estate | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	527
2019	1,295
Prior	43,333
Total Loans	45,155
Substandard | Construction Loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Substandard | Business Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	0
Substandard | Consumer Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	201
2020	0
2019	0
Prior	0
Total Loans	201
Pass | One to four family residential [Member] | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	18,166
2022	155,300
2021	102,559
2020	67,545
2019	34,995
Prior	102,459
Total Loans	481,024
Pass | Multifamily | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	1,097
2022	7,579
2021	23,088
2020	43,936
2019	29,609
Prior	34,129
Total Loans	139,438
Pass | Commercial Real Estate | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	12,083
2022	35,346
2021	82,859
2020	70,849
2019	22,362
Prior	116,683
Total Loans	340,182
Pass | Construction Loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	(131)
2022	25,583
2021	34,813
2020	2,931
2019	407
Prior	0
Total Loans	63,603
Watch | One to four family residential [Member] | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	620
Total Loans	620
Watch | Multifamily | Residential Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	2,274
Total Loans	2,274
Watch | Commercial Real Estate | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	4,185
2020	8,783
2019	0
Prior	5,949
Total Loans	18,917
Watch | Construction Loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Total Loans	$ 0
One to four family residential [Member] | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		475,836
One to four family residential [Member] | Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		473,700
One to four family residential [Member] | Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		1,113
One to four family residential [Member] | Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		1,023
One to four family residential [Member] | Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Multifamily | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		126,895
Multifamily | Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		122,972
Multifamily | Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		2,291
Multifamily | Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Multifamily | Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		1,632
2021 | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		407,882
2021 | Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		342,827
2021 | Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		14,845
2021 | Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		4,668
2021 | Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		45,542
Construction Land Development | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		78,120
Construction Land Development | Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		78,120
Construction Land Development | Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Construction Land Development | Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Construction Land Development | Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Business | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		31,371
Business | Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		31,371
Business | Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Business | Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Business | Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		0
Prior | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		62,055
Prior | Pass | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		61,632
Prior | Watch | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		27
Prior | Special mention | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		203
Prior | Substandard | Previously Reported
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans		$ 193