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Support Service Fees - Additional Information (Detail) - Administrative Support Services Agreement - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Support Service Fees [Line Items] |  |
Support service fees | $ 2,000,000.0 | $ 1,200,000
Prepaid Expenses and Other Current Assets |  |
Support Service Fees [Line Items] |  |
Net amount due from purchaser | $ 746,000 |

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