Cash Equivalents and Investments - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) investment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Gross unrealized losses	$ 10,200,000	$ 9,500,000
Total investments In unrealized loss position | investment	93
Allowance for credit loss on available-for-sale debt securities	$ 0	0
Allowance for credit losses on privately-held debt and redeemable preferred stock investments	8,300,000	0	$ 0
Gross realized gains from available-for-sale debt securities	0	0	15,300,000
Gross realized losses from available-for-sale debt securities	0	0	0
Equity investments, unrealized gains	0	0	0
Equity investments, unrealized losses	0	0	0
Equity securities without readily determinable fair value, upward adjustment	0	0	0
Equity securities without readily determinable fair value, downward adjustment	89,900,000	0	0
Loss from equity method investment	9,600,000	4,800,000	$ 0
Restricted cash and investments	54,300,000
Total fixed income securities
Restricted Cash and Cash Equivalents Items [Line Items]
Gross unrealized losses	1,900,000	9,500,000
OpenLight Photonics, Inc.
Restricted Cash and Cash Equivalents Items [Line Items]
Loss from equity method investment	$ 9,600,000	$ 4,800,000
Ownership percentage	24.10%	25.00%
Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and investments	$ 16,400,000
Other long-term assets
Restricted Cash and Cash Equivalents Items [Line Items]
Gross unrealized losses	8,300,000	$ 0
Restricted cash and investments	$ 37,900,000