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Related Party Transactions - Additional Information (Detail) - Spectrum Inc. - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Related Party Transaction [Line Items] |  |  |  |
Rent expense | $ 0.2 | $ 0.1 | $ 0.5 | $ 0.5
Principal Owner | Minimum |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Non controlling ownership interest minimum | 5.00% |  | 5.00% |

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123406913&loc=d3e41499-112717 + Details
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