Balance Sheet Details - Short-Term Investments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2022	Dec. 31, 2021
Short-term investments
Amortized cost	$ 263,517	$ 314,355
Unrealized gains	8	90
Unrealized losses	(5,925)	(1,102)
Estimated fair value	257,600	313,343
Unrecognized impairment of available-for sale securities	5,900	1,000
Available-for-sale securities allowance for credit losses	0	0
U.S. Government bonds
Short-term investments
Amortized cost	76,785	76,765
Unrealized losses	(960)	(240)
Estimated fair value	$ 75,825	$ 76,525
U.S. Government bonds \| Maximum
Short-term investments
Maturity	2 years	1 year
U.S. Government agency bonds
Short-term investments
Amortized cost	$ 88,530	$ 123,803
Unrealized gains	7	8
Unrealized losses	(2,834)	(540)
Estimated fair value	$ 85,703	$ 123,271
U.S. Government agency bonds \| Maximum
Short-term investments
Maturity	3 years	3 years
Bank certificates of deposit
Short-term investments
Amortized cost	$ 5,500	$ 12,500
Unrealized gains		1
Unrealized losses	(22)	(9)
Estimated fair value	$ 5,478	$ 12,492
Bank certificates of deposit \| Maximum
Short-term investments
Maturity	2 years	1 year
Commercial paper
Short-term investments
Amortized cost		$ 2,998
Unrealized losses		(1)
Estimated fair value		$ 2,997
Commercial paper \| Maximum
Short-term investments
Maturity		1 year
Corporate notes
Short-term investments
Amortized cost	$ 48,301	$ 55,178
Unrealized gains		37
Unrealized losses	(1,191)	(183)
Estimated fair value	$ 47,110	$ 55,032
Corporate notes \| Maximum
Short-term investments
Maturity	3 years	3 years
Asset-backed securities
Short-term investments
Amortized cost	$ 25,980	$ 23,761
Unrealized gains	1	44
Unrealized losses	(406)	(31)
Estimated fair value	$ 25,575	$ 23,774
Asset-backed securities \| Maximum
Short-term investments
Maturity	2 years	2 years
Municipal bonds
Short-term investments
Amortized cost	$ 18,421	$ 19,350
Unrealized losses	(512)	(98)
Estimated fair value	$ 17,909	$ 19,252
Municipal bonds \| Maximum
Short-term investments
Maturity	3 years	3 years

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