Cash, Cash Equivalents and Investments - Investment Category and Length (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) company	Dec. 31, 2021 USD ($) company	Dec. 31, 2020 USD ($)	May 31, 2022 USD ($)	Apr. 30, 2022 USD ($)
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract]
Fair value, in loss position less than twelve months	$ 2,118,000	$ 12,151,000
Gross unrealized (loss), in loss position less than twelve months	(42,000)	(61,000)
Fair value, in loss position greater than twelve months	8,988,000	2,013,000
Gross unrealized (loss), in loss position greater than twelve months	(261,000)	(4,000)
Fair value, total in loss position	11,106,000	14,164,000
Gross unrealized (loss), total in loss position	(303,000)	(65,000)
Restricted Cash
Restricted cash	6,400,000
Minority Investments
Investments, equity method	$ 14,607,000	$ 10,166,000
Number of equity method investments | company	6	5
Impairment charge	$ 0	$ 0	$ 0
Bank Of Beijing
Restricted Cash
Maximum borrowing capacity				$ 3,400,000
Bank Of Beijing | Secured debt
Restricted Cash
Time deposit	2,500,000			$ 1,000,000.0	$ 2,900,000
Certificates of deposit.
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract]
Fair value, in loss position less than twelve months	2,118,000	6,181,000
Gross unrealized (loss), in loss position less than twelve months	(42,000)	(19,000)
Fair value, in loss position greater than twelve months	4,146,000
Gross unrealized (loss), in loss position greater than twelve months	(133,000)
Fair value, total in loss position	6,264,000	6,181,000
Gross unrealized (loss), total in loss position	(175,000)	(19,000)
Corporate bonds
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract]
Fair value, in loss position less than twelve months		5,970,000
Gross unrealized (loss), in loss position less than twelve months		(42,000)
Fair value, in loss position greater than twelve months	4,842,000	2,013,000
Gross unrealized (loss), in loss position greater than twelve months	(128,000)	(4,000)
Fair value, total in loss position	4,842,000	7,983,000
Gross unrealized (loss), total in loss position	(128,000)	(46,000)
Other assets
Minority Investments
Investments, equity method	$ 14,600,000	$ 10,200,000