Investment Securities - Summary Of Amortized Cost and Estimated Fair Value Of Investment Securities Available For Sale (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Investments [Abstract]
Amortized Cost, Within 1 year	$ 0
Amortized Cost, 1 to 5 years	0
Amortized Cost, 5 to 10 years	16,770,750
Amortized Cost, Over 10 years	0
Amortized Cost, Mortgage-backed securities and collateralized mortgage obligations	29,099,657
Total, Amortized Cost	45,870,407	$ 15,409,597
Estimated Fair Value, Within 1 year	0
Estimated Fair Value, 1 to 5 years	0
Estimated Fair Value, 5 to 10 years	16,532,751
Estimated Fair Value, Over 10 years	0
Estimated Fair Value, Mortgage-backed securities and collateralized mortgage obligations	29,098,885
Total, Estimated Fair Value	$ 45,631,636	$ 15,916,866

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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