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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 | 12 Months Ended
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Jan. 31, 2022 | Jan. 31, 2021 | Jan. 31, 2020
STOCK-BASED COMPENSATION |  |  |
Shares, Non-vested, Beginning balance | 467 | 448 | 375
Shares, Granted | 67 | 242 | 238
Shares, Vested | (231) | (207) | (134)
Shares, Forfeitures | (8) | (16) | (31)
Shares, Non-vested, Ending balance | 295 | 467 | 448
Shares, Non-vested | 295 | 467 | 448
Weighted Average Fair Value, Non-vested, Beginning balance | $ 8.01 | $ 9.74 | $ 10.05
Weighted Average Fair Value, Granted | 8.54 | 6.53 | 9.60
Weighted Average Fair Value, Vested | 8.46 | 9.98 | 10.25
Weighted Average Fair Value, Forfeitures | 7.05 | 8.52 | 10.28
Weighted Average Fair Value, Non-vested, Ending balance | 7.80 | 8.01 | 9.74
Weighted Average Fair Value, Non-vested | $ 7.80 | $ 8.01 | $ 9.74

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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=120381028&loc=d3e5070-113901 + Details
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