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Fair Value Measurements and Marketable Equity Securities - Additional Information (Detail) - USD ($)	1 Months Ended			3 Months Ended			9 Months Ended
	Aug. 31, 2026	Jun. 30, 2026	Aug. 31, 2024	Sep. 30, 2026	Aug. 31, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Aug. 30, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of measurement alternative investments				$ 25,500,000			$ 25,500,000		$ 8,000,000
Cumulative upward and downward adjustments from observable price				0			0
Impairment loss				$ 0		$ 0	0	$ 0
Aggregate proceeds from sale of marketable equity securities							$ 0	$ 8,316,000
Pathos Series D Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Class of warrants				23,456,790			23,456,790
Data license fees received from counterparty	$ 8,800,000	$ 8,800,000			$ 17,500,000
Investment In Recursion Pharmaceuticals Class A Common Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment in equity securities at fair value sold number of shares				0			0	737,466
Weighted average price per share of investment sold								$ 11.28
Aggregate proceeds from sale of marketable equity securities								$ 8,300,000
Outstanding common stock percentage							20.00%
Pathos AI [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrant to purchase shares of common stock value				$ 0			$ 0
Commercialization And Reference Laboratory Agreement [Member] \| Personalis Inc [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Class Of Warrant Share Issued				9,218,800			9,218,800				9,218,800
Common stock purchase price			$ 18,400,000
Purchase of additional shares of common stock			3,500,000
Purchase of additional shares of common stock value			$ 17,700,000
Outstanding common stock percentage			20.00%
Commercialization And Reference Laboratory Agreement [Member] \| Personalis Inc [Member] \| Prior December312024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights										$ 1.5
Commercialization And Reference Laboratory Agreement [Member] \| Personalis Inc [Member] \| Prior December312025 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights										$ 2.5
Maximum [Member] \| Commercialization And Reference Laboratory Agreement [Member] \| Personalis Inc [Member] \| Prior December312024 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Class Of Warrant Excisable At Cash				4,609,400			4,609,400
Maximum [Member] \| Commercialization And Reference Laboratory Agreement [Member] \| Personalis Inc [Member] \| Prior December312025 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Class Of Warrant Excisable At Cash										4,609,400