Employee Benefit Plans - Summary of the Change in Plan Assets (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Employee Benefits And Share Based Compensation [Abstract]
Fair value of plan assets at beginning of year	$ 9,168,583	$ 8,257,698
Actual return on assets	1,068,427	1,062,482
Employer contributions	0	485,934
Administrative expenses	(65,873)	(62,698)
Benefits paid, net	(583,244)	(574,833)
Fair value of plan assets at end of year	$ 9,587,893	$ 9,168,583