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Debt - Summary of Interest Expense Recognized Related to Notes (Detail) - Convertible Senior Notes [Member] $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Contractual interest expense	$ 0.1
Amortization of debt discount	0.7
Amortization of debt issuance costs	0.1
Total	$ 0.9

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

Amount of amortization expense attributable to debt issuance costs.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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

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- Definition

Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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