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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 6 Months Ended
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Jul. 31, 2020 | Jul. 31, 2019
ESPP |  |
Stockholders Equity Note Disclosure [Line Items] |  |
Number of shares of common stock issued under ESPP | 0.1 | 0.1
Weighted purchase price of shares of common stock under ESPP | $ 9.98 | $ 9.86
Stock Options |  |
Stockholders Equity Note Disclosure [Line Items] |  |
Aggregate intrinsic value of vested options exercised | $ 0.9 | $ 1.8
Weighted-average grant date fair value of options granted | $ 4.72 | $ 7.13

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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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=120381028&loc=d3e5070-113901 + Details
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