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Shareholders' Equity - Additional Information (Detail) | 12 Months Ended
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Jan. 31, 2020 quarter $ / shares shares | Jan. 31, 2019 shares | Jan. 31, 2018 $ / shares shares
Statement Of Shareholders Equity [Line Items] |  |  |
Preferred stock, shares authorized (in shares) | 1,000,000 | 1,000,000 |
Preferred stock, shares outstanding (in shares) | 994,000 | 830,000 |
Number of quarterly periods to obtain voting rights | quarter | 6 |  |
Common stock, shares authorized (in shares) | 20,000,000 | 20,000,000 |
Common stock, shares issued (in shares) | 14,097,000 | 14,049,000 |
Shares surrendered in exchange for payment of taxes | 0 | 0 | 359
Average fair value of shares (in usd per share) | $ / shares |  |  | $ 4.79
Series A Preferred Stock |  |  |
Statement Of Shareholders Equity [Line Items] |  |  |
Preferred stock, shares outstanding (in shares) | 994,000 | 830,000 |
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 | 120 days |  |
Period of time for listing | 180 days |  |

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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + 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=6877327&loc=d3e13212-122682 + Details
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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=6877327&loc=d3e13212-122682 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644 + Details
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