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Summary of Significant Accounting Policies - Long-Lived Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Goodwill and intangible assets |  |  |
Long-lived intangible impairment | $ 0 | $ 0 | $ 0
Total intangible assets | 19,685 | 19,685 |
Less accumulated amortization | (13,320) | (13,320) |
Net intangible assets | 6,365 | 6,365 |
Amortization expense | 0 | 0 |
Estimated amortization expense |  |  |
2025 | 100 |  |
2026 | 300 |  |
2027 | 300 |  |
2028 | 300 |  |
2029 | 300 |  |
Thereafter | 5,100 |  |
Customer relationships |  |  |
Goodwill and intangible assets |  |  |
Total intangible assets | $ 5,376 | 5,376 |
Customer relationships | Minimum |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 1 year |  |
Customer relationships | Maximum |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 8 years |  |
Acquired contracts |  |  |
Goodwill and intangible assets |  |  |
Total intangible assets | $ 10,749 | 10,749 |
Acquired contracts | Minimum |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 1 year |  |
Acquired contracts | Maximum |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 50 years |  |
Contractual Rights to Manure Feedstock |  |  |
Goodwill and intangible assets |  |  |
Contractual rights acquired | $ 0 | 500 |
Contractual Rights to Manure Feedstock | Minimum |  |  |
Goodwill and intangible assets |  |  |
Initial term of contractual rights acquired | 20 years |  |
Contractual Rights to Manure Feedstock | Maximum |  |  |
Goodwill and intangible assets |  |  |
Initial term of contractual rights acquired | 50 years |  |
Trademark and trade names |  |  |
Goodwill and intangible assets |  |  |
Total intangible assets | $ 2,700 | 2,700 |
Trademark and trade names | Minimum |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 2 years |  |
Trademark and trade names | Maximum |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 10 years |  |
Non-compete agreements |  |  |
Goodwill and intangible assets |  |  |
Estimated useful lives | 3 years |  |
Total intangible assets | $ 860 | $ 860 |

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