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Convertible Senior Notes (Tables) | 6 Months Ended
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Jun. 30, 2020
Debt Disclosure [Abstract] |
Summary of Convertible Debt | The net carrying amount of the liability and equity components of the Notes was as follows (in thousands):
| June 30, 2020 |  | December 31, 2019
Liability component: |  |  |
Principal | $ | 345,000 |  |  | $ | 345,000 |
Unamortized discount | (53,327) |  |  | (57,247) |
Unamortized issuance costs | (6,662) |  |  | (7,152) |
Net carrying amount | $ | 285,011 |  |  | $ | 280,601 |
Equity component, net of purchase discounts and issuance costs | $ | 58,560 |  |  | $ | 58,560 |
Interest expense related to the Notes is as follows (in thousands):
| Three Months Ended June 30, 2020 |  | Six Months Ended June 30, 2020
Contractual interest expense | $ | 970 |  |  | $ | 1,940 |
Amortization of debt discount | 1,967 |  |  | 3,920 |
Amortization of issuance costs | 246 |  |  | 490 |
Total interest expense | $ | 3,183 |  |  | $ | 6,350 |

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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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- References No definition available. + Details
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