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Convertible Notes | 6 Months Ended
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Jun. 30, 2021
Debt Disclosure [Abstract] |
Convertible Notes | Convertible Notes The Company’s convertible notes are shown in the following table:
|  | As of
(In thousands) |  | June 30, 2021 |  | December 31, 2020
2023 Notes |  | $ | 172,500 |  |  | $ | 172,500 |
Unamortized discount — 2023 Notes |  | (11,896) |  |  | (15,420) |
Unamortized debt issuance costs — 2023 Notes |  | (798) |  |  | (1,049) |
Total convertible notes |  | 159,806 |  |  | 156,031 |
Less current portion |  | — |  |  | — |
Total long-term convertible notes |  | $ | 159,806 |  |  | $ | 156,031 |
Interest expense related to the notes for the three and six months ended June 30, 2021 and 2020 was as follows:
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(In thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
2023 Notes coupon interest at a rate of 1.375% |  | $ | 593 |  |  | $ | 593 |  |  | $ | 1,186 |  |  | $ | 1,186 |
2023 Notes amortization of discount and debt issuance cost at an additional effective interest rate of 4.9% |  | 1,901 |  |  | 1,798 |  |  | 3,775 |  |  | 3,571 |
Total interest expense on convertible notes |  | $ | 2,494 |  |  | $ | 2,391 |  |  | $ | 4,961 |  |  | $ | 4,757 |

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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