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Commitments and Contingencies - Narrative (Details) $ in Millions	Sep. 30, 2021 USD ($) facility item
Other Commitments [Line Items]
Number of leased facilities \| facility	2
Number of letters of credit \| item	2
Money Market Mutual Funds \| Letter of Credit
Other Commitments [Line Items]
Letters of credit	$ 2.3
Restricted cash	$ 2.3

Amount of cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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