Debt - Components of Interest Expense (Details) - Convertible Senior Notes - Convertible Debt - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Contractual interest expense	$ 0.2	$ 0.1	$ 0.5	$ 0.1
Interest cost related to amortization of issuance costs	0.6	0.2	1.1	0.2
Total interest expense	$ 0.8	$ 0.3	$ 1.6	$ 0.3

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration