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Loans and Allowance for Credit Losses on Loans - Schedule of Accounts, Notes, Loans and Financing Receivable (Detail) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Total loans | $ 414,512 |  | $ 400,056 |  |  |
Net deferred loan costs | 2,547 |  | 2,449 |  |  |
Allowance for credit losses on loans | (3,319) | $ (3,287) | (3,581) | $ (3,644) | $ (3,642) | $ (3,590)
Net loans | 413,740 |  | 398,924 |  |  |
CRE [Member] |  |  |  |  |  |
Total loans | 88,051 |  | 80,506 |  |  |
Allowance for credit losses on loans | (806) | (725) | (942) | (1,019) | (894) | (833)
MF [Member] |  |  |  |  |  |
Total loans | 7,787 |  | 8,185 |  |  |
Allowance for credit losses on loans | (49) | (49) | (54) | (57) | (78) | (80)
C+I [Member] |  |  |  |  |  |
Total loans | 24,168 |  | 24,059 |  |  |
Allowance for credit losses on loans | (277) | (281) | (184) | (208) | (218) | (194)
ADL [Member] |  |  |  |  |  |
Total loans | 14,999 |  | 18,490 |  |  |
Allowance for credit losses on loans | (70) | (96) | (138) | (110) | (116) | (178)
RES [Member] |  |  |  |  |  |
Total loans | 259,562 |  | 251,466 |  |  |
Allowance for credit losses on loans | (1,910) | (1,904) | (2,048) | (2,025) | (2,188) | (2,139)
HELOC [Member] |  |  |  |  |  |
Total loans | 12,121 |  | 10,161 |  |  |
Allowance for credit losses on loans | (85) | (88) | (81) | (87) | (62) | (63)
CON [Member] |  |  |  |  |  |
Total loans | 7,824 |  | 7,189 |  |  |
Allowance for credit losses on loans | $ (109) | $ (119) | $ (100) | $ (111) | $ (86) | $ (75)

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481696/310-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 + Details
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- Definition Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 + Details
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