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Borrowings - Components of Interest Expense and Related Fees (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
2025 Notes |  |
Line Of Credit Facility [Line Items] |  |
Stated interest expense | $ 3,194 | $ 3,194
Amortization of deferred financing costs | 498 | 504
Total interest and amortization of deferred financing costs | $ 3,692 | $ 3,698
Weighted average effective interest rate | 8.10% | 8.10%
Weighted average outstanding balance | $ 182,500 | $ 182,500
August 2026 Notes |  |
Line Of Credit Facility [Line Items] |  |
Stated interest expense | 1,367 | 1,367
Amortization of deferred financing costs | 144 | 144
Total interest and amortization of deferred financing costs | $ 1,511 | $ 1,511
Weighted average effective interest rate | 4.80% | 4.80%
Weighted average outstanding balance | $ 125,000 | $ 125,000
December 2026 Notes |  |
Line Of Credit Facility [Line Items] |  |
Stated interest expense | 797 | 797
Amortization of deferred financing costs | 99 | 93
Total interest and amortization of deferred financing costs | $ 896 | $ 890
Weighted average effective interest rate | 4.80% | 4.70%
Weighted average outstanding balance | $ 75,000 | $ 75,000
March 2029 Notes |  |
Line Of Credit Facility [Line Items] |  |
Stated interest expense | 75 |
Amortization of deferred financing costs | 5 |
Total interest and amortization of deferred financing costs | $ 80 |
Weighted average effective interest rate | 8.50% |
Weighted average outstanding balance | $ 3,791 |
6.00% Convertible Notes due 2025 |  |
Line Of Credit Facility [Line Items] |  |
Stated interest expense | 750 | 750
Amortization of deferred financing costs | $ 166 | $ 160
Weighted average effective interest rate | 7.30% | 7.30%
Weighted average outstanding balance | $ 50,000 | $ 50,000
Total interest and amortization of deferred financing costs and original issue discount | 916 | 910
KeyBank Credit Facility |  |
Line Of Credit Facility [Line Items] |  |
Stated interest expense | 4,843 | 3,868
Amortization of deferred financing costs | 206 | 204
Total interest and amortization of deferred financing costs | $ 5,049 | $ 4,072
Weighted average effective interest rate | 9.10% | 8.30%
Weighted average outstanding balance | $ 221,086 | $ 197,111

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