Unaudited Interim Condensed Consolidated Statements of Cash Flows Supplemental Information - Additional Information (Detail) - USD ($) $ in Thousands |
Sep. 30, 2021 |
Dec. 31, 2020 |
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| Condensed Cash Flow Statements, Captions [Line Items] | ||
| Restricted cash | $ 4,138 | $ 495 |
| Tranche Four Secured Notes [Member] | Funds Held In Escrow [Member] | ||
| Condensed Cash Flow Statements, Captions [Line Items] | ||
| Restricted cash | $ 4,100 | $ 500 |
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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. No definition available.
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- Definition Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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