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Share-Based Compensation - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Apr. 30, 2026 | Apr. 30, 2025 | Jan. 31, 2026
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares outstanding | 263,849 |  | 319,049
Number of options granted | 0 | 0 |
Annual compensation amount | $ 389,000 | $ 306,000 |
2007 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares outstanding | 65,349 |  |
2018 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares outstanding | 146,500 |  |
Shares available for grant under the Plan | 1,550,000 |  |
2026 Long-Term Incentive Program |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense | $ 175,000 |  |
Accrued liability | 66,000 |  | $ 241,000
2027 Long-Term Incentive Program |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation expense | 175,000 |  |
Accrued liability | 66,000 |  |
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 3 months 18 days |  |
Unrecognized compensation expense related to RSUs and RSAs | $ 3,900,000 |  |
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 | 452,361 |  |
RSA [Member] | 2015 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares outstanding | 52,000 |  |
Performance Based RSUs [Member] | 2018 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of unvested shares | 103 |  |
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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