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Basis of Presentation and Summary of Significant Accounting Policies - Investment Categories (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale
Amortized cost	$ 150,728	$ 150,187
Gross unrealized gains	2,095	57
Gross unrealized losses	(1,972)	(6,626)
Estimated fair value	150,851	143,618
Viking common stock	26,500	40,240
Total short-term investments	177,351	183,858
U.S. Treasuries
Debt Securities, Available-for-sale
Amortized cost	64,585	78,442
Gross unrealized gains	1	19
Gross unrealized losses	(16)	(13)
Estimated fair value	64,570	78,448
Commercial paper
Debt Securities, Available-for-sale
Amortized cost	54,436	23,483
Gross unrealized gains	3	5
Gross unrealized losses	(29)	(6)
Estimated fair value	54,410	23,482
Corporate notes/bonds
Debt Securities, Available-for-sale
Amortized cost	17,138	15,496
Gross unrealized gains	13	21
Gross unrealized losses	(11)	(8)
Estimated fair value	17,140	15,509
Corporate equity securities
Debt Securities, Available-for-sale
Amortized cost	7,828	9,954
Gross unrealized gains	2,077	0
Gross unrealized losses	(1,915)	(6,595)
Estimated fair value	7,990	3,359
Certificates of Deposit
Debt Securities, Available-for-sale
Amortized cost	6,741	22,812
Gross unrealized gains	1	12
Gross unrealized losses	(1)	(4)
Estimated fair value	$ 6,741	$ 22,820

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