Income Taxes - Summary of Effective Income Tax Rate Reconciliation (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Expected income tax expense at federal tax rate	$ 688,490	$ 1,160,726
Increase (decrease) in taxes resulting from:
State income tax, net of federal income tax effect	251,707	365,835
Bank Owned Life Insurance	(85,184)	(95,851)
Tax exempt interest, net	(18,785)	(25,249)
Other, net	14,384	(14,870)
Total income tax expense	$ 850,612	$ 1,390,591