Investments - Schedule of Fair Values of Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Oct. 01, 2024	Dec. 31, 2023
Amortized Cost
Schedule of Investments [Line Items]
Total cash equivalents and investments		$ 247,593
Less: cash equivalents		(41,582)
Total Investments		206,011
Amortized Cost | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	$ 170,964
Less: cash equivalents	(14,745)
Total Investments	156,219
Amortized Cost | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			$ 122,418
Less: cash equivalents			(58,644)
Total Investments			63,774
Amortized Cost | Commercial Bonds and Paper | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		57,477
Amortized Cost | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	44,145
Amortized Cost | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			43,251
Amortized Cost | Money Market Funds | Fair Value, Inputs, Level 1
Schedule of Investments [Line Items]
Total cash equivalents and investments		31,298
Amortized Cost | Money Market Funds | Fair Value, Inputs, Level 1 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	14,745
Amortized Cost | Money Market Funds | Fair Value, Inputs, Level 1 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			69,611
Amortized Cost | U.S. Treasury Securities | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		158,818
Amortized Cost | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	112,074
Amortized Cost | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			9,556
Gross Unrealized Holding Gains
Schedule of Investments [Line Items]
Total cash equivalents and investments		968
Total Investments		968
Gross Unrealized Holding Gains | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	233
Total Investments	233
Gross Unrealized Holding Gains | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			191
Total Investments			191
Gross Unrealized Holding Gains | Commercial Bonds and Paper | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		268
Gross Unrealized Holding Gains | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	49
Gross Unrealized Holding Gains | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			135
Gross Unrealized Holding Gains | U.S. Treasury Securities | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		700
Gross Unrealized Holding Gains | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	184
Gross Unrealized Holding Gains | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			56
Gross Unrealized Holding Losses
Schedule of Investments [Line Items]
Total cash equivalents and investments		(14)
Total Investments		(14)
Gross Unrealized Holding Losses | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	(53)
Total Investments	(53)
Gross Unrealized Holding Losses | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			(38)
Total Investments			(38)
Gross Unrealized Holding Losses | Commercial Bonds and Paper | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		(12)
Gross Unrealized Holding Losses | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	(24)
Gross Unrealized Holding Losses | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			(38)
Gross Unrealized Holding Losses | U.S. Treasury Securities | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		(2)
Gross Unrealized Holding Losses | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	(29)
Estimated Fair Value
Schedule of Investments [Line Items]
Total cash equivalents and investments		248,547
Less: cash equivalents		(41,582)
Total Investments		206,965
Estimated Fair Value | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	171,144
Less: cash equivalents	(14,745)
Total Investments	156,399
Estimated Fair Value | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			122,571
Less: cash equivalents			(58,644)
Total Investments			63,927
Estimated Fair Value | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	44,170
Estimated Fair Value | Commercial Bonds and Paper | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			43,348
Estimated Fair Value | Money Market Funds | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		57,733
Estimated Fair Value | Money Market Funds | Fair Value, Inputs, Level 1
Schedule of Investments [Line Items]
Total cash equivalents and investments		31,298
Estimated Fair Value | Money Market Funds | Fair Value, Inputs, Level 1 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	4,745
Estimated Fair Value | Money Market Funds | Fair Value, Inputs, Level 1 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			69,611
Estimated Fair Value | U.S. Treasury Securities | Fair Value, Inputs, Level 2
Schedule of Investments [Line Items]
Total cash equivalents and investments		$ 159,516
Estimated Fair Value | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Available-for-Sale Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments	$ 112,229
Estimated Fair Value | U.S. Treasury Securities | Fair Value, Inputs, Level 2 | Held-to-Maturity Investments
Schedule of Investments [Line Items]
Total cash equivalents and investments			$ 9,612