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STOCK-BASED COMPENSATION - Summary of Change in Number of Non-Vested Options to Purchase Shares of Common Stock (Details) - $ / shares shares in Thousands | 3 Months Ended |
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Apr. 30, 2021 | Apr. 30, 2020
STOCK-BASED COMPENSATION |  |
Shares, Non-vested, Beginning balance | 467 |
Shares, Granted | 32 |
Shares, Vested | (117) |
Shares, Forfeitures | (3) |
Shares, Non-vested, Ending balance | 379 |
Shares, Non-vested | 379 | 557
Weighted Average Fair Value, Non-vested, Beginning balance | $ 8.01 |
Weighted Average Fair Value, Granted | 11.12 |
Weighted Average Fair Value, Vested | 8.06 |
Weighted Average Fair Value, Forfeitures | 8.67 |
Weighted Average Fair Value, Non-vested, Ending balance | 8.25 |
Weighted Average Fair Value, Non-vested | $ 8.25 | $ 8.42

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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