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Shareholders' Equity - Additional information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
May 01, 2017 | Jan. 31, 2019 | Jan. 31, 2018 | Jan. 31, 2017
Class of Stock [Line Items] |  |  |  |
Company shares given to employees, shares |  | 33,430 | 26,561 | 51,531
Company shares given to employees, value |  | $ 600 | $ 400 | $ 800
Common stock, authorized to be repurchased, value |  |  | $ 11,238 |
Common stock shares additional authorized |  | 390,000 |  |
Stock Repurchase Agreement [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common stock, number of shares repurchased, shares | 826,305 |  |  |
Common stock repurchased, per share amount | $ 13.60 |  |  |
Common stock, authorized to be repurchased, value | $ 11,200 |  |  |
Common stock owned by trust, shares | 36,000 |  |  |

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- Definition Number of shares of stock delivered by employers to satisfy the exercise price for stock options exercised and restricted stock vested. + References No definition available. + Details
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- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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