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Summary of Option Activity (Detail) - Incentive Stock Options - $ / shares	3 Months Ended					6 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Beginning balance	74,291	108,036	108,423	117,249	123,087	108,036	108,036
Incentive Stock Option Plans, Option exercised	(1,541)	(33,745)	(387)	(8,826)	(5,838)		(33,745)
Incentive Stock Option Plans, Ending balance	72,750	74,291	108,036	108,423	117,249	72,750	74,291
Weighted Average Price Per Share, Beginning balance	$ 11.49	$ 11.49	$ 11.49	$ 11.48	$ 11.48	$ 11.49	$ 11.49
Weighted Average Price Per Share, Option exercised	11.49	11.49	11.49	11.35	11.49		11.49
Weighted Average Price Per Share, Ending balance	$ 11.49	$ 11.49	$ 11.49	$ 11.49	$ 11.48	$ 11.49	$ 11.49

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Number of options outstanding, including both vested and non-vested options.

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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