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Long-Term Debt (Tables) | 6 Months Ended
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Jun. 30, 2020
Debt Disclosure [Abstract] |
Schedule of maturities of long-term debt outstanding | Scheduled maturities of our long-term debt outstanding as of June 30, 2020 are as follows (in thousands):
| Term Loan (1) |  | 2022 Notes |  | 2023 Notes |  |  |  | MARAD Debt |  | Nordea Q5000 Loan |  | Total
Less than one year | $ | 3,500 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 7,378 |  |  | $ | 71,428 |  |  | $ | 82,306 |
One to two years | 28,000 |  |  | 125,000 |  |  | — |  |  |  |  | 7,746 |  |  | — |  |  | 160,746 |
Two to three years | — |  |  | — |  |  | — |  |  |  |  | 8,133 |  |  | — |  |  | 8,133 |
Three to four years | — |  |  | — |  |  | 125,000 |  |  |  |  | 8,538 |  |  | — |  |  | 133,538 |
Four to five years | — |  |  | — |  |  | — |  |  |  |  | 8,965 |  |  | — |  |  | 8,965 |
Over five years | — |  |  | — |  |  | — |  |  |  |  | 19,294 |  |  | — |  |  | 19,294 |
Gross debt | 31,500 |  |  | 125,000 |  |  | 125,000 |  |  |  |  | 60,054 |  |  | 71,428 |  |  | 412,982 |
Unamortized debt discounts (2) | — |  |  | (6,395) |  |  | (12,829) |  |  |  |  | — |  |  | — |  |  | (19,224) |
Unamortized debt issuance costs (3) | (286) |  |  | (971) |  |  | (2,068) |  |  |  |  | (3,293) |  |  | (278) |  |  | (6,896) |
Total debt | 31,214 |  |  | 117,634 |  |  | 110,103 |  |  |  |  | 56,761 |  |  | 71,150 |  |  | 386,862 |
Less: current maturities | (3,500) |  |  | — |  |  | — |  |  |  |  | (7,378) |  |  | (71,150) |  |  | (82,028) |
Long-term debt | $ | 27,714 |  |  | $ | 117,634 |  |  | $ | 110,103 |  |  |  |  | $ | 49,383 |  |  | $ | — |  |  | $ | 304,834 |
(1) Term Loan pursuant to the Credit Agreement (as defined below) matures in December 2021. (2) Convertible Senior Notes due 2022 and 2023 will increase to their face amounts through accretion of their debt discounts to interest expense through May 2022 and September 2023, respectively. (3) Debt issuance costs are amortized to interest expense over the term of the applicable debt agreement.
Schedule of components of net interest expense | The following table details the components of our net interest expense (in thousands):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Interest expense | $ | 7,179 |  |  | $ | 8,045 |  |  | $ | 14,573 |  |  | $ | 15,941 |
Interest income | (116) |  |  | (675) |  |  | (582) |  |  | (1,433) |
Capitalized interest | — |  |  | (5,165) |  |  | (1,182) |  |  | (10,205) |
Net interest expense | $ | 7,063 |  |  | $ | 2,205 |  |  | $ | 12,809 |  |  | $ | 4,303 |

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