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CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - Related Party Transactions (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Revenues: |  |  |  |  |
Revenues |  | $ 168,717 | $ 170,934 | $ 541,936 | $ 536,295
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold |  | 75,743 | 70,977 | 243,823 | 225,435
Expenses: |  |  |  |  |
Operating expenses | [1] | 64,882 | 62,363 | 193,718 | 191,655
Selling, general and administrative | [1] | 9,257 | 12,494 | 31,913 | 32,108
Terminalling and storage |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | [1] | 23,930 | 22,562 | 67,883 | 67,454
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold | [1] | 0 | 23 | 0 | 65
Transportation |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | [1] | 49,709 | 56,506 | 156,520 | 172,489
Product Sales |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | [1] | 91,005 | 88,389 | 305,164 | 285,921
Specialty products |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | [1] | 62,443 | 67,206 | 192,066 | 200,819
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold | [1] | 54,844 | 58,409 | 167,608 | 173,192
Sulfur services |  |  |  |  |
Revenues: |  |  |  |  |
Revenues | [1] | 28,562 | 21,183 | 113,098 | 85,102
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold | [1] | 20,899 | 12,545 | 76,215 | 52,178
Related Party |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 26,090 | 25,851 | 79,203 | 79,649
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold |  | 11,276 | 11,438 | 30,871 | 32,333
Expenses: |  |  |  |  |
Operating expenses |  | 27,857 | 26,153 | 83,245 | 79,077
Selling, general and administrative |  | 7,133 | 12,215 | 23,160 | 27,716
Related Party | Terminalling and storage |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 18,622 | 17,785 | 54,105 | 54,412
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold |  | 0 | 23 | 0 | 65
Expenses: |  |  |  |  |
Operating expenses |  | 6,053 | 5,646 | 17,672 | 16,611
Related Party | Transportation |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 6,521 | 7,975 | 21,811 | 24,894
Expenses: |  |  |  |  |
Operating expenses |  | 20,282 | 19,257 | 61,271 | 58,844
Related Party | Product Sales |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 947 | 91 | 3,287 | 343
Related Party | Specialty products |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 45 | 82 | 548 | 272
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold |  | 7,973 | 8,401 | 21,260 | 23,342
Related Party | Sulfur services |  |  |  |  |
Revenues: |  |  |  |  |
Revenues |  | 902 | 9 | 2,739 | 71
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Cost of products sold |  | 3,303 | 3,014 | 9,611 | 8,926
Expenses: |  |  |  |  |
Operating expenses |  | $ 1,522 | $ 1,250 | $ 4,302 | $ 3,622
[1] | Related Party Transactions Included Above
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Revenues:* |  |  |  |  |  |  |
Terminalling and storage | $ | 18,622 |  |  | $ | 17,785 |  |  | $ | 54,105 |  |  | $ | 54,412 |
Transportation | 6,521 |  |  | 7,975 |  |  | 21,811 |  |  | 24,894 |
Product Sales | 947 |  |  | 91 |  |  | 3,287 |  |  | 343 |
Costs and expenses:* |  |  |  |  |  |  |
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |  |  |
Specialty products | 7,973 |  |  | 8,401 |  |  | 21,260 |  |  | 23,342 |
Sulfur services | 3,303 |  |  | 3,014 |  |  | 9,611 |  |  | 8,926 |
Terminalling and storage | — |  |  | 23 |  |  | — |  |  | 65 |
Expenses: |  |  |  |  |  |  |
Operating expenses | 27,857 |  |  | 26,153 |  |  | 83,245 |  |  | 79,077 |
Selling, general and administrative | 7,133 |  |  | 12,215 |  |  | 23,160 |  |  | 27,716 |

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