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Financing Arrangements (Tables)
12 Months Ended
Dec. 31, 2020
Debt Instrument [Line Items]  
Summary of Current and Non-current Debt

The following table summarizes the current and non-current debt as of December 31, 2020 and 2019:

 

 

 

Year Ended December 31,

 

 

 

2020

 

 

2019

 

Credit Agreement

 

$

 

 

$

90.0

 

Convertible Senior Notes due 2021

 

 

38.9

 

 

 

78.6

 

Convertible Senior Notes due 2025

 

 

39.3

 

 

 

0.0

 

Total debt

 

$

78.2

 

 

$

168.6

 

     Less current portion of debt

 

 

38.9

 

 

 

 

Total non-current portion of debt

 

$

39.3

 

 

$

168.6

 

Schedule of Net Carrying Amount of Extinguished Convertible Senior Notes

 

Net carrying amount of extinguished Convertible Senior Notes due 2021 as of December 15, 2020

 

 

 

 

    Principal

 

$

46.0

 

    Less: Debt issuance costs, net of amortization

 

 

(0.1

)

    Less: Debt discount, net of amortization

 

 

(1.5

)

Fair value of extinguished Convertible Senior Notes due 2021 as of December 15, 2020

 

 

45.3

 

Loss on extinguishment of debt

 

$

(0.9

)

 

Schedule of Amount Allocated to Reacquisition of Equity Component Included as Reduction To Additional Paid-In Capital

The amount allocated to the reacquisition of the equity component, included as a reduction to additional paid-in capital on the Consolidated Balance Sheets, was calculated as follows:

 

Fair value of extinguished Convertible Senior Notes due 2021 as of December 15, 2020

 

$

45.3

 

Principal of extinguished Convertible Senior Notes due 2021

 

 

46.0

 

Reduction of additional paid-in capital

 

$

(0.7

)

Schedule of Interest Expense

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

 

 

Year Ended December 31,

 

 

 

2020

 

 

2019

 

Contractual interest expense

 

$

5.2

 

 

$

5.2

 

Amortization of debt issuance costs

 

 

0.5

 

 

 

0.4

 

Amortization of debt discount

 

 

4.4

 

 

 

4.0

 

Total

 

$

10.1

 

 

$

9.6

 

Convertible Senior Notes due 2021  
Debt Instrument [Line Items]  
Schedule of Components of Convertible Notes

The components of the Convertible Senior Notes due 2021 as of December 31, 2020 and December 31, 2019 were as follows:

 

 

 

Year Ended December 31,

 

 

 

2020

 

 

2019

 

Principal

 

$

40.2

 

 

$

86.3

 

Less: Debt issuance costs, net of amortization

 

 

(0.1

)

 

 

(0.7

)

Less: Debt discount, net of amortization

 

 

(1.2

)

 

 

(7.0

)

Convertible Senior Notes due 2021, net

 

$

38.9

 

 

$

78.6

 

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 December 31, 2020 is as follows:

 

 

 

Year Ended December 31, 2020

Principal

 

$

46.0

 

 

Less: Debt issuance costs, net of amortization

 

 

(1.3

)

 

Less: Debt discount, net of amortization

 

 

(5.4

)

 

Convertible Senior Notes due 2025, net

 

$

39.3