Accounts Receivables, Contract Assets, and Contract Liabilities - Additional information - (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Oct. 31, 2021 |
Oct. 31, 2021 |
Oct. 31, 2020 |
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| Receivables [Abstract] | |||
| Deferred revenue, recognized | $ 800 | $ 3,800 | |
| Transaction price allocated to performance obligations | $ 25,500 | $ 25,500 | $ 10,000.0 |
| X | ||||||||||
- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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