Loans Receivable Held for Investment, Activity in Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		$ 4,388	[1]	$ 3,391
Charge-offs		0		0
Recoveries		216		0
Provision (recapture)		935		997
Ending balance	[1]	7,348		4,388
Real Estate [Member] | Single-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		109		145
Charge-offs		0		0
Recoveries		0		0
Provision (recapture)		(63)		(36)
Ending balance		260		109
Real Estate [Member] | Multi-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		3,273		2,657
Charge-offs		0		0
Recoveries		109		0
Provision (recapture)		428		616
Ending balance		4,413		3,273
Real Estate [Member] | Commercial Real Estate [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		449		236
Charge-offs		0		0
Recoveries		107		0
Provision (recapture)		72		213
Ending balance		1,094		449
Real Estate [Member] | Church [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		65		103
Charge-offs		0		0
Recoveries		0		0
Provision (recapture)		(30)		(38)
Ending balance		72		65
Real Estate [Member] | Construction [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		313		212
Charge-offs		0		0
Recoveries		0		0
Provision (recapture)		400		101
Ending balance		932		313
Commercial - Other [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		175		23
Charge-offs		0		0
Recoveries		0		0
Provision (recapture)		100		152
Ending balance		529		175
SBA Loans [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		0
Charge-offs		0
Recoveries		0
Provision (recapture)		28
Ending balance		48		0
Consumer [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		4		15
Charge-offs		0		0
Recoveries		0		0
Provision (recapture)		0		(11)
Ending balance		0		4
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		1,809
Ending balance				1,809
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate [Member] | Single-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		214
Ending balance				214
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate [Member] | Multi-Family [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		603
Ending balance				603
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate [Member] | Commercial Real Estate [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		466
Ending balance				466
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate [Member] | Church [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		37
Ending balance				37
Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate [Member] | Construction [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		219
Ending balance				219
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial - Other [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		254
Ending balance				254
Cumulative Effect, Period of Adoption, Adjustment [Member] | SBA Loans [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		20
Ending balance				20
Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		(4)
Ending balance				(4)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Allowance for Credit Losses on Loans [Roll Forward]
Beginning balance		$ 1,809
Ending balance				$ 1,809

[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.