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Balance Sheet Account Details - Available-for-Sale Debt Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Gross Unrealized Losses
Less than 12 months	$ (34)	$ (3)
12 months or greater	(60)	0
Total	(94)	(3)
Estimated Fair Value
Less than 12 months	53,949	26,232
12 months or greater	18,674	0
Total	72,623	26,232
Bank deposits
Gross Unrealized Losses
Less than 12 months	(13)	(1)
12 months or greater	0	0
Total	(13)	(1)
Estimated Fair Value
Less than 12 months	20,008	14,013
12 months or greater	0	0
Total	20,008	14,013
Corporate bonds
Gross Unrealized Losses
Less than 12 months	(15)	(1)
12 months or greater	(5)	0
Total	(20)	(1)
Estimated Fair Value
Less than 12 months	27,252	4,526
12 months or greater	2,996	0
Total	30,248	4,526
Commercial paper
Gross Unrealized Losses
Less than 12 months	(6)	(1)
12 months or greater	(32)	0
Total	(38)	(1)
Estimated Fair Value
Less than 12 months	6,689	7,693
12 months or greater	10,125	0
Total	16,814	$ 7,693
U.S. government securities
Gross Unrealized Losses
Less than 12 months	0
12 months or greater	(23)
Total	(23)
Estimated Fair Value
Less than 12 months	0
12 months or greater	5,553
Total	$ 5,553

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