Fair Value Measurement - Significant unobservable inputs used in fair value measurement of Level 3 assets (Detail) - Fair Value, Nonrecurring [Member]	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate Owned Fair Value Disclosure	$ 52,900	$ 683,800
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate Owned Fair Value Disclosure	$ 52,900	$ 683,800
Fair Value, Inputs, Level 3 [Member] | Valuation Third Party Appraisals And Sales Contracts [Member] | Weighted Average [Member] | Measurement Input Collateral Discounts And Estimated Costs To Sell [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate Owned, Measurement Input	42	52