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Leases - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2022
Lessee Lease Description [Line Items] |  |  |
Increase to operating lease liabilities |  | $ 0.8 | $ 4.4
Increase to operating lease ROU assets |  | 0.8 | 4.4
Operating lease expense | $ 3.7 | $ 3.7 | $ 3.5
Weighted-average remaining lease term - operating leases | 1 year 9 months 7 days |  |
Weighted-average discount rate - operating leases | 3.63% |  |
Shanghai [Member] | Extended Office Lease [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease inception date |  |  | Dec. 01, 2021
Expiration date |  |  | Nov. 30, 2024
Lease term |  |  | 3 years
Shanghai [Member] | Additional Office Space [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease inception date |  |  | Aug. 01, 2021
Expiration date |  |  | Nov. 30, 2024
Lease term |  |  | 40 months
Shenzhen and Santa Clara [Member] | Extended Office Lease [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease inception date |  | Oct. 01, 2022 |
Expiration date |  | Sep. 30, 2024 |
Shenzhen [Member] | Extended Office Lease [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease term |  | 2 years |
Santa Clara [Member] | Extended Office Lease [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease term |  | 2 years |
Hong Kong [Member] | Extended Office Lease [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease inception date |  |  | Dec. 01, 2021
Expiration date |  |  | Nov. 30, 2026
Lease term |  |  | 5 years

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- Definition Increased amount of lessee's right to use underlying asset under operating lease. + References No definition available. + Details
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- Definition Date which lease or group of leases is set to expire, in YYYY-MM-DD format. + References No definition available. + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 + Details
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