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Fair Value Measurements - Narrative (Detail) - USD ($) $ in Millions | 2 Months Ended | 4 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2021 | Oct. 19, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2021 | Nov. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Increase in fair value of warrant liabilities | $ 1.2 | $ 0.0 | $ (24.8) | $ 37.6 | $ 0.0 |
Impairment loss on business held for sale |  |  | 0.0 | $ 3.5 |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | Biodex Rehabilitation Business |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  |  |  | $ 8.0
Impairment loss on business held for sale |  |  | $ 3.5 |  |  |

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