Investments - Amortized Cost, Gross Unrealized Gains/Losses In Accumulated Other Comprehensive Loss And Fair Value Of Marketable Debt Securities, Available-For-Sale (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Short-term investments:
Amortized Cost	$ 65,604	$ 94,782
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(953)	(87)
Marketable debt securities, available-for-sale — short-term	64,651	94,696
Long-term investments:
Amortized Cost	13,622	55,111
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(404)	(295)
Marketable debt securities, available-for-sale — long-term	13,218	54,816
Corporate debt security
Short-term investments:
Amortized Cost	42,945	71,406
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(695)	(57)
Marketable debt securities, available-for-sale — short-term	42,250	71,349
Long-term investments:
Amortized Cost	11,580	42,703
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(349)	(246)
Marketable debt securities, available-for-sale — long-term	11,231	42,457
U.S. treasuries
Short-term investments:
Amortized Cost	5,608	3,415
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(74)	(7)
Marketable debt securities, available-for-sale — short-term	5,534	3,408
Long-term investments:
Amortized Cost		2,201
Gross Unrealized Gains		0
Gross Unrealized Losses		(5)
Marketable debt securities, available-for-sale — long-term		2,196
Asset-backed security and other
Short-term investments:
Amortized Cost	5,868	2,555
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(77)	(4)
Marketable debt securities, available-for-sale — short-term	5,791	2,551
Long-term investments:
Amortized Cost	2,042	5,438
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(55)	(28)
Marketable debt securities, available-for-sale — long-term	1,987	5,410
Non-U.S. government and supranational bonds
Short-term investments:
Amortized Cost	9,179	16,405
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(107)	(19)
Marketable debt securities, available-for-sale — short-term	9,072	16,387
Long-term investments:
Amortized Cost		3,769
Gross Unrealized Gains		0
Gross Unrealized Losses		(16)
Marketable debt securities, available-for-sale — long-term		3,753
Certificate of deposit
Short-term investments:
Amortized Cost	2,004	1,001
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Marketable debt securities, available-for-sale — short-term	$ 2,004	1,001
Long-term investments:
Amortized Cost		1,000
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Marketable debt securities, available-for-sale — long-term		$ 1,000