Investments - Summary of Short term Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 514,240	$ 531,430
Gross Unrealized Gains	8	3
Gross Unrealized Losses	(1,583)	(437)
Total Fair Value	512,665	530,996
Within 1 year, Amortized Cost	468,815
After 1 year through 5 years, Amortized Cost	43,525
After 5 years through 10 Years, Amortized Cost	572
After 10 Years, Amortized Cost	1,328
Within 1 year, Fair Value	467,572
After 1 year through 5 years, Fair Value	43,195
After 5 years through 10 years, Fair Value	570
After 10 Years, Fair Value	1,328
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	303,945	247,259
Gross Unrealized Gains	4	3
Gross Unrealized Losses	(1,579)	(432)
Total Fair Value	302,370	246,830
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,503	12,915
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(59)	(11)
Total Fair Value	20,445	12,905
Certificate of deposits
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,525	12,076
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	17,525	12,076
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,736	30,691
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	24,736	30,691
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	229,958	179,235
Gross Unrealized Gains	3	1
Gross Unrealized Losses	(1,485)	(410)
Total Fair Value	228,476	178,826
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	458	458
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	(1)
Total Fair Value	455	457
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,101	8,418
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(5)	(2)
Total Fair Value	5,096	8,417
U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,164	2,966
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(27)	(8)
Total Fair Value	5,137	2,958
Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	500	500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	500	500
Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	210,295	284,171
Gross Unrealized Gains	4	0
Gross Unrealized Losses	(4)	(5)
Total Fair Value	210,295	284,166
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	53,513	5,499
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	53,513	5,499
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,686	4,921
Gross Unrealized Gains	4	0
Gross Unrealized Losses	(4)	(5)
Total Fair Value	12,686	4,916
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,000
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Total Fair Value	2,000
Money market funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	122,048	269,251
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	122,048	269,251
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	750	500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	750	500
U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,298	4,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair Value	13,298	4,000
U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,000
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Total Fair Value	6,000
Level 1
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	158,008	288,285
Level 1 | Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	22,662	15,034
Level 1 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Certificate of deposits
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	17,525	12,076
Level 1 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	5,137	2,958
Level 1 | Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	135,346	273,251
Level 1 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0
Level 1 | Money market funds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	122,048	269,251
Level 1 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 1 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	13,298	4,000
Level 1 | U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0
Level 2
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	354,657	242,711
Level 2 | Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	279,708	231,796
Level 2 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	20,445	12,905
Level 2 | Certificate of deposits
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 2 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	24,736	30,691
Level 2 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	228,476	178,826
Level 2 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	455	457
Level 2 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	5,096	8,417
Level 2 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 2 | Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	500	500
Level 2 | Cash equivalents
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	74,949	10,915
Level 2 | Commercial paper
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	53,513	5,499
Level 2 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	12,686	4,916
Level 2 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	2,000
Level 2 | Money market funds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	0
Level 2 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	750	500
Level 2 | U.S. government bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	0	$ 0
Level 2 | U.S. government agency bonds
Debt Securities, Available-for-sale [Line Items]
Total Fair Value	$ 6,000