Available for Sale Securities - Summary of Amortized Costs and Fair Values of Securities Available-for-sale, by Contractual Maturity (Detail) $ in Thousands	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 1,512
Due after one through 5 years	13,982
Due after 5 through 10 years	14,822
Due after 10 years	11,452
Subtotal	41,768
Total	112,440
Due in one year or less	1,505
Due after one through 5 years	13,901
Due after 5 through 10 years	14,812
Due after 10 years	11,500
Subtotal	41,718
Total	112,246
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Subtotal	64,149
Subtotal	64,049
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Subtotal	6,523
Subtotal	$ 6,479

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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