Loans Receivable - Summary of Portfolio Segments and Classes of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 945,059	$ 927,615
Deferred costs (fees)	(312)	(256)
Allowance for credit losses	(10,526)	(4,666)	$ (3,443)	$ (3,152)
Net loans	934,845	923,205
Agriculture And Farmland Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	53,301	55,746
Allowance for credit losses		(279)
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	67,934	57,713
Allowance for credit losses		(274)
Commercial And Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	99,356	104,755
Consumer and Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	10,472	10,057
Municipal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	4,292	5,466
Allowance for credit losses		(12)
Multifamily [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	111,461	105,390
Allowance for credit losses		(480)
Owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	151,407	139,554
Allowance for credit losses		(635)
Non-owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	249,638	245,274
Allowance for credit losses		(1,116)
First Liens [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	166,478	168,084
Allowance for credit losses		(1,029)
Second Liens and Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 30,720	35,576
Allowance for credit losses		$ (218)