The remaining contractual life of the convertible debt instrument.

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- 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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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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Amount, after accumulated amortization, of debt discount.

+ References

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- Definition

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

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No definition available.

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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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Convertible Senior Notes - Due 2025 - Summary (Details) - 2025 Notes - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	May 08, 2018
Convertible Senior Notes
Principal	$ 287,500		$ 287,500		$ 287,500	$ 287,500
Less: Debt discount, net	(74,989)		(74,989)		(81,207)
Net carrying amount	212,511		$ 212,511		$ 206,293
Remaining contractual life			4 years 10 months 24 days
Interest Expense
Contractual interest expense	989	$ 1,002	$ 1,977	$ 1,977
Amortization of debt discount	3,142	2,892	6,218	5,728
Total	$ 4,131	$ 3,894	$ 8,195	$ 7,705
Effective interest rate of the liability component (as a percent)	7.90%	7.90%	7.90%	7.90%
Level 2
Convertible Senior Notes
Fair value	$ 1,023,900		$ 1,023,900