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Employee Benefit Plans - Summary of Change in Plan Assets (Detail) - Supplemental Employee Retirement Plan [Member] - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Change in Plan Assets
Fair value of plan assets at beginning of year
Employer contribution	491,622	$ 544,261
Benefits paid	(491,622)	(544,261)
Fair value of plan assets at end of year
Funded status	(10,187,817)	(10,805,326)
Unrecognized net actuarial (gain) loss	1,418,856	1,939,269
Cumulative employer contributions in excess of the net periodic pension cost	$ (8,768,961)	$ (8,866,057)

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Cumulative employer contributions in excess of net periodic benefit cost.

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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