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Related Party Transactions - Additional Information (Detail) - Lessee Company Where Ceo of the Lessor Company is the Member of Board of Directors [Member] $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
Dec. 07, 2018 ft² | Sep. 30, 2021 | Sep. 30, 2020 USD ($) | Apr. 01, 2019 ft²
Related Party Transaction [Line Items] |  |  |  |
Area of space subleased | 400 |  |  |
Revised area of space subleased |  |  |  | 3,700
Sublease lease term extension |  | 2 years |  |
Percentage of profit arising on sublease due to excess amount collected from subtenant to be shared |  |  |  | 50.00%
Operating lease rental expense sublease rentals | $ |  |  | $ 160 |

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- Definition The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=123403562&loc=d3e38371-112697 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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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- Definition Area of space subleased. + References No definition available. + Details
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- Definition Extended sublease term. + References No definition available. + Details
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- Definition Percentage Of Profit Arising On Sublease On Account Of Excess Amount Collected From Subtenant To Be Shared Percentage of profit arising on sublease on account of excess amount collected from subtenant to be shared. + References No definition available. + Details
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- Definition Revised area of space subleased + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
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