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Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands | Apr. 30, 2023 | Jan. 31, 2023
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 102,685 | $ 101,686
Unrealized Gains | 162 | 116
Unrealized Losses | (544) | (608)
Fair Value | 102,303 | 101,194
Money market funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 1,661 | 7,872
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | 1,661 | 7,872
Commercial paper [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 11,442 | 18,333
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | 11,442 | 18,333
Corporate bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 36,630 | 23,472
Unrealized Gains | 101 | 50
Unrealized Losses | (211) | (224)
Fair Value | 36,520 | 23,298
Asset-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 18,678 | 18,753
Unrealized Gains | 31 | 44
Unrealized Losses | (149) | (149)
Fair Value | 18,560 | 18,648
U.S. government securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 34,274 | 33,256
Unrealized Gains | 30 | 22
Unrealized Losses | (184) | (235)
Fair Value | $ 34,120 | $ 33,043

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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