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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Detail) - shares |  | 9 Months Ended |
--- | --- | --- | ---
Jul. 16, 2020 | Sep. 30, 2021 | Dec. 31, 2020
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Performance multiplier, maximum |  | 200.00% |
Performance multiplier, minimum |  | 0.00% |
Participating securities that share in losses (in shares) |  | 0 |
Series A and Series B Convertible Preferred Stock |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Aggregate common stock upon conversion (in shares) | 43,750,000 |  |
Restricted Stock |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares of unvested restricted stock outstanding (in shares) |  | 952,971 | 1,038,006

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