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Debt (Tables) | 9 Months Ended
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Sep. 30, 2020
Debt Disclosure [Abstract] |
Convertible Debt [Table Text Block] | Convertible senior notes consist of the following (in thousands):
|  | September 30, 2020 |  |  | December 31, 2019 |
4.875% convertible senior notes due 2020 |  | $ | — |  |  | $ | 1,905 |
3.25% convertible senior notes due 2023* |  |  | 38,401 |  |  |  | 50,753 |
Total convertible senior notes |  | $ | 38,401 |  |  | $ | 52,658 |
* The amounts presented for the 3.25% convertible senior notes due 2023 within the table represent the fair value as of September 30, 2020 and December 31, 2019 (see Note 16 - Fair Value Measurements). The principal amount of these notes totaled $29.6 million and $37.6 million as of September 30, 2020 and December 31, 2019, respectively. The accrued, but unpaid, payment-in-kind interest is $1.0 million and $0.4 million as of September 30, 2020 and December 31, 2019, respectively.
Schedule of Debt [Table Text Block] | Term loan consists of the following (in thousands):
|  | September 30, 2020 |  |  | December 31, 2019 |
|  | Principal Amount** |  |  | Debt Discount/ Issuance Costs* |  |  | Net Amount |  |  | Principal Amount** |  |  | Debt Discount/ Issuance Costs* |  |  | Net Amount |
Term Loan |  | $ | 134,801 |  |  | $ | (9,441 | ) |  | $ | 125,360 |  |  | $ | 134,801 |  |  | $ | (12,319 | ) |  | $ | 122,482 |
* The term loan was valued using the discounted cash flow method to determine the implied debt discount. The debt discount and issuance costs are being amortized over the life of the term loan. ** The amount presented excludes accrued, but unpaid, payment-in-kind interest of $4.0 million and $1.3 million as of September 30, 2020 and December 31, 2019, respectively.

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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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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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