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Share-Based Compensation - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 11, 2024 | Jul. 31, 2025 | Aug. 03, 2024 | Jul. 31, 2025 | Aug. 03, 2024 | Jan. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares outstanding |  | 319,049 |  | 319,049 |  | 421,699
Number of options granted |  |  |  | 30,000 |  | 0
Annual compensation amount |  | $ 499,000 | $ 481,000 | $ 805,000 | $ 806,000 |
Weighted average fair value per share for options granted |  | $ 6.15 |  | $ 6.15 |  |
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% |  |
Termination date |  |  |  | Apr. 22, 2025 |  |
2007 Equity Incentive Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares outstanding |  | 117,349 |  | 117,349 |  |
2018 Equity Incentive Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares outstanding |  | 146,500 |  | 146,500 |  |
Shares available for grant under the Plan |  | 1,550,000 |  | 1,550,000 |  |
2026 Long-Term Incentive Program |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share-based compensation expense |  | $ 43,000 |  | $ 43,000 |  |
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 |  | 124,000 |  | $ 124,000 |  |
Unrecognized compensation expense to be recognized, Weighted average period |  |  |  | 3 months 18 days |  |
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 3 months 18 days |  |
Unrecognized compensation expense related to RSUs and RSAs |  | $ 1,100,000 |  | $ 1,100,000 |  |
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 |  | 153,117 |  | 153,117 |  |
RSA [Member] | 2015 Equity Incentive Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares outstanding |  | 55,200 |  | 55,200 |  |
Performance Based RSUs [Member] | 2018 Equity Incentive Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of unvested shares |  | 20,000 |  | 20,000 |  |
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 |  |  |  |  |

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