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Employee Benefit Plan (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan Disclosure
Company matching contribution percentage	50.00%	50.00%	50.00%
Employer match contribution	$ 270,000	$ 252,000	$ 219,000
Maximum
Defined Contribution Plan Disclosure
Percent of employee contributions the company contributes a matching contribution	6.00%	6.00%	6.00%

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- Definition

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

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