Loans Receivable Held for Investment, Activity in Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		$ 6,285		$ 3,539	$ 4,388	[1]	$ 3,391
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		685	[2]	(577)	773	[2]	(429)
Ending balance		6,970	[1]	2,962	6,970	[1]	2,962
Provision for off balance sheet loan commitments		83			37
Real Estate [Member] | Single Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		261		157	109		145
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		(14)	[2]	(37)	(76)	[2]	(25)
Ending balance		247		120	247		120
Real Estate [Member] | Multi-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		3,932		2,771	3,273		2,657
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		323	[2]	(493)	379	[2]	(379)
Ending balance		4,255		2,278	4,255		2,278
Real Estate [Member] | Commercial Real Estate [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		1,012		217	449		236
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		0	[2]	(64)	97	[2]	(83)
Ending balance		1,012		153	1,012		153
Real Estate [Member] | Church [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		92		63	65		103
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		(9)	[2]	(15)	(19)	[2]	(55)
Ending balance		83		48	83		48
Real Estate [Member] | Construction [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		593		236	313		212
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		195	[2]	(15)	256	[2]	9
Ending balance		788		221	788		221
Commercial - Other [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		357		95	175		23
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		189	[2]	43	117	[2]	115
Ending balance		546		138	546		138
SBA Loans [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		38			0
Charge-offs		0			0
Recoveries		0			0
Provision (recapture)	[2]	1			19
Ending balance		39			39
Consumer [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		0		0	4		15
Charge-offs		0		0	0		0
Recoveries		0		0	0		0
Provision (recapture)		0	[2]	4	0	[2]	(11)
Ending balance		$ 0		$ 4	0		$ 4
ASU 2016-13 [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					6,197
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					1,809
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Single Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					214
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Multi-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					603
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Commercial Real Estate [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					466
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Church [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					37
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate [Member] | Construction [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					219
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Commercial - Other [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					254
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | SBA Loans [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					20
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Consumer [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance					$ (4)

[1] The allowance for credit losses as of December 31, 2022 was accounted for under ASC 450 and ASC 310, which is reflective of probable incurred losses as of the date of the consolidated statement of financial condition. Effective January 1, 2023, the allowance for credit losses is accounted for under ASC 326, which is reflective of estimated expected lifetime credit losses.

[2] The bank also recorded a provision for off balance sheet loan commitments of $83 thousand for the three months ended June 30, 2023 and $37 thousand for six months ended June 30, 2023.