Loans Receivable Held for Investment, Allowance for Loan Losses and Recorded Investment in Loans by Type of Loans and Based on Impairment Method (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	$ 7	$ 7
Collectively evaluated for impairment	3,532	3,384
Total ending allowance balance	3,539	3,391	$ 3,215	$ 3,215
Loans [Abstract]
Loans individually evaluated for impairment	2,248	2,301
Loans collectively evaluated for impairment	476,341	447,692
Subtotal	478,589	449,993
Loans acquired in the merger	179,701	203,753
Gross loans receivable	658,290	653,746
Real Estate [Member] | Single Family [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	3	3
Collectively evaluated for impairment	154	142
Total ending allowance balance	157	145	275	296
Loans [Abstract]
Loans individually evaluated for impairment	64	65
Loans collectively evaluated for impairment	31,151	32,599
Subtotal	31,215	32,664
Loans acquired in the merger	8,930	12,708
Gross loans receivable	40,145	45,372
Real Estate [Member] | Multi-Family [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,771	2,657
Total ending allowance balance	2,771	2,657	2,473	2,433
Loans [Abstract]
Loans individually evaluated for impairment	277	282
Loans collectively evaluated for impairment	368,647	353,179
Subtotal	368,924	353,461
Loans acquired in the merger	34,002	41,769
Gross loans receivable	402,926	395,230
Real Estate [Member] | Commercial Real Estate [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	217	236
Total ending allowance balance	217	236	219	222
Loans [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	24,594	25,507
Subtotal	24,594	25,507
Loans acquired in the merger	65,808	67,686
Gross loans receivable	90,402	93,193
Real Estate [Member] | Church [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	4	4
Collectively evaluated for impairment	59	99
Total ending allowance balance	63	103	221	237
Loans [Abstract]
Loans individually evaluated for impairment	1,907	1,954
Loans collectively evaluated for impairment	8,062	9,058
Subtotal	9,969	11,012
Loans acquired in the merger	11,396	11,491
Gross loans receivable	21,365	22,503
Real Estate [Member] | Construction [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	236	212
Total ending allowance balance	236	212	0	22
Loans [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	26,606	24,225
Subtotal	26,606	24,225
Loans acquired in the merger	7,332	7,847
Gross loans receivable	33,938	32,072
Commercial - Other [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	95	23
Total ending allowance balance	95	23	$ 5	$ 4
Loans [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	17,281	3,124
Subtotal	17,281	3,124
Loans acquired in the merger	36,599	43,415
Gross loans receivable	53,880	46,539
SBA Loans [Member]
Ending Allowance Balance Attributable to Loans [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	15
Total ending allowance balance	0	15
Loans [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	0	0
Subtotal	0	0
Loans acquired in the merger	15,488	18,837
Gross loans receivable	$ 15,488	$ 18,837