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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 26, 2025 | Mar. 31, 2025 | Apr. 12, 2024 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2025 | Apr. 15, 2025 | Sep. 30, 2024 | May 31, 2022
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Contingent obligation |  |  |  |  | $ 4,213 |  |  |  |
IM Topco, LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  | 30.00% |  | 30.00%
Contingent obligation |  | $ 3,970 |  | $ 3,970 |  |  |  |  |
Expense (income) to carrying value of contingent contractual obligations |  |  |  | $ (240) |  | $ (240) |  |  |
Capital appreciation right, percent | 15.00% |  |  |  |  |  |  |  |
Capital appreciation right, threshold | $ 46,000 |  |  |  |  |  |  |  |
WHP | IM Topco, LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership equity transferable |  | 12.50% |  |  |  |  |  |  |
Current portion of contingent obligation |  |  |  |  | 4,210 |  |  | $ 6,250 |
Expense (income) to carrying value of contingent contractual obligations |  |  |  |  | $ (2,040) |  |  |  |
Amended Services Agreement | Xcel Brands | IM Topco, LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 30.00% |  |  |  |  |  |
Amended Services Agreement | WHP | IM Topco, LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 70.00% |  |  |  |  |  |
Amended Services Agreement | Twelve-month period ending March 31, 2025 |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Royalty guarantees |  |  | $ 13,500 |  |  |  |  |  |
Amended Services Agreement | Year ending December 31, 2025 |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Royalty guarantees |  |  | $ 18,000 |  |  |  |  |  |
Amended Services Agreement | If Royalties Receivable Less Than Specified Amount |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership equity transferable |  |  | 12.50% |  |  |  |  |  |
Amended Services Agreement | If Royalties Receivable Less Than Specified Amount | Xcel Brands | IM Topco, LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 17.50% |  |  |  |  |  |
Amended Services Agreement | If Royalties Receivable Less Than Specified Amount | WHP | IM Topco, LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 82.50% |  |  |  |  |  |

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