Number of shares granted percentage.

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Reservation of shares under employee stock purchase plan.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of noncash expense for share-based payment arrangement.

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Discount rate from fair value on purchase date that participants pay for shares.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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

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Share-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended
	Jun. 11, 2024	Apr. 30, 2025	Apr. 27, 2024	Jan. 31, 2025	Jun. 06, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding		361,549		421,699
Number of options granted		0	0
Annual compensation amount		$ 306,000	$ 325,000
Reservation of shares under Stock Purchase Plan		40,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan discount rate		15.00%
2007 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding		118,449
2018 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding		130,500
Shares available for grant under the Plan					600,000
2018 Equity Incentive Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under the Plan					950,000
2018 Equity Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under the Plan					1,550,000
2022 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under the Plan		6,045
Prior Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchase under Employee Stock Purchase Plan		6,463
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to options		$ 0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense to be recognized, Weighted average period		2 years 4 months 24 days
Unrecognized compensation expense related to RSUs and RSAs		$ 1,900,000
Restricted Stock Units (RSUs) [Member] \| 2018 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unvested shares		196,147
RSA [Member] \| 2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding		112,600
Performance Based RSUs [Member] \| 2018 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unvested shares		60,615
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of number of shares granted		25.00%
Annual compensation amount	$ 72,800