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Accounts Payable and Other Current Liabilities - Schedule of Accounts Payable and Other Current Liabilities (Detail) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Payables and Accruals [Abstract] |  |
Trade payables | $ 13.8 | $ 17.3
Accrued event costs | 18.3 | 7.4
Other current liabilities | 9.6 | 11.3
Accrued personnel costs | 7.9 | 4.7
Total accounts payable and other current liabilities | $ 49.6 | $ 40.7

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