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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions | Jul. 31, 2021 | Jan. 31, 2021
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Daimler [Member] |  |
Related Party Transaction [Line Items] |  |
Related party accounts receivable | $ 2.5 | $ 1.2

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Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |