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Equity Plan Awards - Summary of Option Activity (Detail) - Incentive Stock Options - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Beginning balance	68,896	108,036	123,087
Incentive Stock Option Plans, Option exercised	(4,024)	(39,140)	(15,051)
Incentive Stock Option Plans, Ending balance	64,872	68,896	108,036
Weighted Average Price Per Share, Beginning balance	$ 11.49	$ 11.49	$ 11.48
Weighted Average Price Per Share, Option exercised	11.49	11.49	11.41
Weighted Average Price Per Share, Ending balance	$ 11.49	$ 11.49	$ 11.49

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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