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Equity and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2020 | Oct. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Quarterly dividends declared (in usd per share) | $ 0.5625 |  |  |
Average option price (in dollars per share) | $ 2.27 |  |  |
Compensation expense related to stock-based awards granted | $ 113 | $ 270 | $ 562 | $ 612
Stock option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized (in shares) | 70,000 |  | 70,000 |

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