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Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Summary of Carrying Amount of Borrowings | Carrying amount of the Company’s borrowings consisted of the following (in thousands):
|  | December 31, 2023 |  |  | December 31, 2022 |
Senior convertible notes |  | $ | 226,851 |  |  | $ | 225,397 |
MidCap credit facility |  |  | 33,019 |  |  |  | 39,264 |
Mann Group convertible note |  |  | 8,829 |  |  |  | 8,829 |
Total debt – net carrying amount |  | $ | 268,699 |  |  | $ | 273,490 |
Schedule of Line of Credit Facility Debt and Key Terms | The following table provides a summary of the Company’s principal balance of debt and key terms:
|  | Amount Due |  | Terms
|  | December 31, 2023 |  | December 31, 2022 |  | Annual Interest Rate |  |  | Maturity Date |  | Conversion Price
Senior convertible notes |  | $230.0 million |  | $230.0 million |  | 2.50% |  |  | March 2026 |  | $5.21 per share
MidCap credit facility |  | $33.3 million |  | $40.0 million |  | one-month SOFR (1% floor) plus 6.25%; cap of 8.25% |  | (1 | ) | August 2025 |  | N/A
Mann Group convertible note |  | $8.8 million |  | $8.8 million |  | 2.50% |  |  | December 2025 |  | $2.50 per share
_________________________ (1) In August 2022, the Company amended the MidCap credit facility and transitioned the benchmark interest rate from LIBOR to the Secured Overnight Financing Rate (“SOFR”). The interest rate prior to the amendment was one-month LIBOR (1% floor) plus 6.25% (cap of 8.25%).
Schedule of Maturities of the Company's Borrowings | The maturities of the Company’s borrowings as of December 31, 2023 are as follows (in thousands):
|  | Amounts |
2024 |  | $ | 20,000 |
2025 |  |  | 22,163 |
2026 |  |  | 230,000 |
Total principal payments |  |  | 272,163 |
Unamortized discount and prepayment fee |  |  | (313 | )
Debt issuance costs |  |  | (3,151 | )
Total debt |  | $ | 268,699 |
Schedule of Amortization of Premium and Accretion of Debt Issuance Costs | Amortization of the premium and accretion of debt issuance costs related to all borrowings for the years ended December 31, 2023, 2022 and 2021 are as follows (in thousands):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Amortization of debt discount and prepayment fee |  | $ | 423 |  |  | $ | 431 |  |  | $ | 377 |
Amortization of debt issuance cost |  |  | 1,454 |  |  |  | 1,453 |  |  |  | 1,215 |

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