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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Allowance for credit losses	$ 0		$ 0		$ 0
Prepaid expenses and other current assets	21,614,000		21,614,000		16,290,000
Other Income (Expense) [Member]
Foreign currency transaction gains (losses)	$ (100,000)	$ 700,000	$ 1,000,000	$ 300,000
Convertible Senior Notes Due 2028 [Member]
Debt instrument, interest rate	1.50%		1.50%
Spare Parts Inventory [Member]
Prepaid expenses and other current assets	$ 4,800,000		$ 4,800,000		$ 4,000,000
Customer Concentration Risk | Revenue Benchmark | Significant Customer Benchmark [Member] | Minimum [Member]
Concentration risk percentage	10.00%	10.00%	10.00%	10.00%
Customer Concentration Risk | Accounts Receivable | Significant Customer Benchmark [Member] | Minimum [Member]
Concentration risk percentage			10.00%		10.00%

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