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Long-Term Debt (Tables) | 9 Months Ended
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Jun. 30, 2021
Debt Disclosure [Abstract] |
Schedule of Long-Term Debt | Long-term debt consisted of the following (in thousands):
|  | June 30, 2021 |  |  | September 30, 2020 |
3.00% Convertible Senior Notes due 2025, net of unamortized discount of $15,929 and deferred issuance costs of $4,005 at June 30, 2021. Effective interest rate 6.29%. |  | $ | 155,066 |  |  | $ | 151,791 |  |
Senior Credit Facilities, net of unamortized discount of $1,958 and deferred issuance costs of $236 at June 30, 2021. Effective interest rate 2.91%. |  |  | 116,556 |  |  |  | 121,331 |
Total debt |  | $ | 271,622 |  |  | $ | 273,122 |
Less: current portion |  |  | (6,250 | ) |  |  | (6,250 | )
Total long-term debt |  | $ | 265,372 |  |  | $ | 266,872 |
Summary of Maturities of Borrowing Obligations | The following table summarizes the maturities of our borrowing obligations as of June 30, 2021 (in thousands):
Fiscal Year |  | Convertible Senior Notes |  |  | Senior Facilities |  |  | Total |
2021 |  | $ | — |  |  | $ | 1,562 |  |  | $ | 1,562 |
2022 |  |  | — |  |  |  | 6,250 |  |  |  | 6,250 |
2023 |  |  | — |  |  |  | 10,938 |  |  |  | 10,938 |
2024 |  |  | — |  |  |  | 12,500 |  |  |  | 12,500 |
2025 |  |  | 175,000 |  |  |  | 87,500 |  |  |  | 262,500 |
Thereafter |  |  | — |  |  |  | — |  |  |  | — |
Total before unamortized discount and issuance costs and current portion |  | $ | 175,000 |  |  | $ | 118,750 |  |  | $ | 293,750 |
Less: unamortized discount and issuance costs |  |  | (19,934 | ) |  |  | (2,194 | ) |  |  | (22,128 | )
Less: current portion of long-term debt |  |  | — |  |  |  | (6,250 | ) |  |  | (6,250 | )
Total long-term debt |  | $ | 155,066 |  |  | $ | 110,306 |  |  | $ | 265,372 |
Schedule of Interest Expense Related to Notes | The interest expense recognized related to the Notes for the three and nine months ended June 30, 2021 was as follows (dollars in thousands):
|  | Three Months Ended June 30, |  |  | Nine Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Contractual interest expense |  | $ | 1,308 |  |  | $ | 431 |  |  | $ | 3,924 |  |  | $ | 431 |
Amortization of debt discount |  |  | 886 |  |  |  | 276 |  |  |  | 2,617 |  |  |  | 276 |
Amortization of issuance costs |  |  | 223 |  |  |  | 70 |  |  |  | 658 |  |  |  | 70 |
Total interest expense related to the Notes |  | $ | 2,417 |  |  | $ | 777 |  |  | $ | 7,199 |  |  | $ | 777 |

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