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Summary of Option Activity (Detail) - Incentive Stock Options - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Beginning balance	67,359	68,896	108,036
Incentive Stock Option Plans, Option exercised	(1,287)	(1,537)	(33,745)
Incentive Stock Option Plans, Ending balance	66,072	67,359	74,291
Weighted Average Price Per Share, Beginning balance	$ 11.49	$ 11.49	$ 11.49
Weighted Average Price Per Share, Option exercised	11.49	11.49	11.49
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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