Fair Value Measurement - Summary of Assets Recorded at Fair Value on a Nonrecurring Basis (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets recorded at fair value on a recurring basis	$ 9,587,893	$ 9,168,583
Fair Value, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other real estate owned	1,115,100	81,000
Assets recorded at fair value on a recurring basis	1,115,100	81,000
Level 3 [Member] | Fair Value, Nonrecurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other real estate owned	1,115,100	81,000
Assets recorded at fair value on a recurring basis	$ 1,115,100	$ 81,000