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Stockholders' Equity - Additional Information (Detail) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Jan. 31, 2021 quarterlyPeriod $ / shares shares | Jan. 31, 2020 shares | Jul. 31, 2021 shares | Aug. 03, 2020 shares | Aug. 02, 2020 shares
Statement Of Shareholders Equity [Line Items] |  |  |  |  |
Preferred stock, shares authorized (in shares) | 2,000,000 | 2,000,000 | 2,000,000 | 2,000,000 | 1,000,000
Preferred stock, shares outstanding (in shares) | 1,038,000 | 994,000 | 1,223,000 |  |
Number of quarterly periods to obtain voting rights | quarterlyPeriod | 6 |  |  |  |
Common stock, shares authorized (in shares) | 40,000,000 | 40,000,000 | 40,000,000 | 40,000,000 | 20,000,000
Common stock, shares issued (in shares) | 15,681,000 | 14,049,000 | 15,704,000 |  |
Treasury stock, shares (in shares) | 1,929,000 | 1,929,000 | 1,931,000 |  |
Shares surrendered in exchange for payment of taxes (in shares) | 0 | 0 |  |  |
Series A Preferred Stock - $1.00 par value per share |  |  |  |  |
Statement Of Shareholders Equity [Line Items] |  |  |  |  |
Preferred stock, shares outstanding (in shares) | 1,038,232 | 994,046 |  |  |
Preferred stock, dividend rate | 9.00% |  |  |  |
Preferred stock, liquidation preference per share (in usd per share) | $ / shares | $ 25.00 |  |  |  |
Preferred stock, dividend rate (in usd per share) | $ / shares | 2.25 |  |  |  |
Preferred stock, redemption price (in usd per share) | $ / shares | $ 25.00 |  |  |  |
Preferred stock, redemption period (in days) | 120 days |  |  |  |
Period of time for listing (in days) | 180 days |  |  |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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