Financing Arrangements (Tables)

6 Months Ended

Jun. 30, 2022

Debt Instrument [Line Items]

Summary of Current and Non-current Debt

The following table summarizes the current and non-current debt as of June 30, 2022 and December 31, 2021:

	June 30, 2022		December 31, 2021
Credit Agreement	$	—	$	—
Convertible Senior Notes due 2025		20.4		44.9
Total debt	$	20.4	$	44.9
Less current portion of debt		20.4		44.9
Total non-current portion of debt	$	—	$	—

Schedule of Interest Expense

The following table provides the components of interest expense, net for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended June 30,					Six Months Ended June 30,
	2022			2021		2022			2021
Interest expense	$	0.9		$	1.7	$	2.1		$	3.5
Interest income		(0.3	)		—		(0.3	)		—
Interest expense, net	$	0.6		$	1.7	$	1.8		$	3.5

Convertible Senior Notes due 2025

Debt Instrument [Line Items]

Schedule of Components of Convertible Notes

The components of the Convertible Senior Notes due 2025 as of June 30, 2022 and December 31, 2021 were as follows:

	June 30, 2022			December 31, 2021
Principal	$	20.8		$	46.0
Less: Debt issuance costs, net of amortization		(0.4	)		(1.1	)
Convertible Senior Notes due 2025, net	$	20.4		$	44.9

Convertible Notes

Debt Instrument [Line Items]

Schedule of Interest Expense

The following table sets forth interest expense recognized specifically related to the Convertible Notes:

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Contractual interest expense	$	0.5	$	1.1	$	1.1	$	2.3
Amortization of debt issuance costs		—		0.1		0.1		0.2
Total	$	0.5	$	1.2	$	1.2	$	2.5