Fair Value Measurements - Financial Assets & Liabilities Measured At Fair Value On Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets:
Total assets	$ 250,028	$ 274,868
Cash Equivalents
Assets:
Total assets	37,019	58,935
Cash Equivalents | Money Market Fund
Assets:
Total assets	23,032	23,712
Cash Equivalents | Commercial Paper
Assets:
Total assets	13,987	34,248
Cash Equivalents | Corporate Debt Securities
Assets:
Total assets		975
Marketable Securities
Assets:
Total assets	213,009	215,933
Marketable Securities | Commercial Paper
Assets:
Total assets	141,860	176,735
Marketable Securities | Asset Backed Securities
Assets:
Total assets	1,321	7,011
Marketable Securities | U S Treasury Securities
Assets:
Total assets	55,390	28,148
Marketable Securities | U.S. Government Agency Securities
Assets:
Total assets	11,459
Marketable Securities | Corporate Debt Securities
Assets:
Total assets	2,979	4,039
Level 1
Assets:
Total assets	78,422	51,860
Level 1 | Cash Equivalents
Assets:
Total assets	23,032	23,712
Level 1 | Cash Equivalents | Money Market Fund
Assets:
Total assets	23,032	23,712
Level 1 | Marketable Securities
Assets:
Total assets	55,390	28,148
Level 1 | Marketable Securities | U S Treasury Securities
Assets:
Total assets	55,390	28,148
Level 2
Assets:
Total assets	171,606	223,008
Level 2 | Cash Equivalents
Assets:
Total assets	13,987	35,223
Level 2 | Cash Equivalents | Commercial Paper
Assets:
Total assets	13,987	34,248
Level 2 | Cash Equivalents | Corporate Debt Securities
Assets:
Total assets		975
Level 2 | Marketable Securities
Assets:
Total assets	157,619	187,785
Level 2 | Marketable Securities | Commercial Paper
Assets:
Total assets	141,860	176,735
Level 2 | Marketable Securities | Asset Backed Securities
Assets:
Total assets	1,321	7,011
Level 2 | Marketable Securities | U.S. Government Agency Securities
Assets:
Total assets	11,459
Level 2 | Marketable Securities | Corporate Debt Securities
Assets:
Total assets	$ 2,979	$ 4,039