Revenues - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Revenues - Additional Information (Detail) $ in Millions	Sep. 30, 2025 USD ($) Customer	Sep. 30, 2024 Customer	Sep. 30, 2025 USD ($) Customer	Sep. 30, 2024 Customer	Dec. 31, 2024 USD ($)
Deferred Revenue Arrangement [Line Items]
Revenue recognized included contract liability \| $	$ 5.9		$ 38.5		$ 44.8
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Deferred Revenue Arrangement [Line Items]
Number of customers accounted for Specific revenue	0	0	0	0
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Deferred Revenue Arrangement [Line Items]
Number of customers represented 10% or more of total accounts receivable	0	0	0	0
United States and United Kingdom [Member] \| Geographic Concentration Risk [Member] \| Accounts Receivable [Member]
Deferred Revenue Arrangement [Line Items]
Long-lived assets percentage					10.00%
United States [Member] \| Geographic Concentration Risk [Member] \| Accounts Receivable [Member]
Deferred Revenue Arrangement [Line Items]
Long-lived assets percentage			10.00%