Fair Value Measurements - Fair Value Measurements, Recurring and Nonrecurring (Detail) - Financial Instruments [Member] - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	$ 136,842	$ 177,682
Investments	77,335	74,169
Contingent Consideration Payable	(32,789)	(41,943)
Warrant Liability	(3,586)	(4,520)
Fair Value, Net Asset (Liability)	177,802	205,388
Fair Value, Inputs, Level 1 [member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	136,842	177,682
Investments	24,308	24,749
Contingent Consideration Payable	0	0
Warrant Liability	0	0
Fair Value, Net Asset (Liability)	161,150	202,431
Fair Value, Inputs, Level 2 [member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0	0
Investments	0	0
Contingent Consideration Payable	0	0
Warrant Liability	0	0
Fair Value, Net Asset (Liability)	0	0
Fair Value, Inputs, Level 3 [member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0	0
Investments	53,027	49,420
Contingent Consideration Payable	(32,789)	(41,943)
Warrant Liability	(3,586)	(4,520)
Fair Value, Net Asset (Liability)	$ 16,652	$ 2,957