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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Accounting Policies [Abstract] |
Schedule of Estimated Useful Lives of Property and Equipment | The estimated useful lives of our property and equipment for purposes of computing depreciation are as follows (in years):
Computer equipment | 3
Office equipment | 3
Furniture, fixtures and equipment | 3 | - | 7
Leasehold improvements | Shorter of the remaining lease term or estimated useful life for leasehold improvements.
Property and equipment, net consisted of the following (in thousands):
| December 31,
| 2024 |  | 2023
Computer equipment | $ | 786 |  |  | $ | 812 |
Furniture and equipment | 885 |  |  | 928 |
Leasehold improvements | 2,389 |  |  | 2,511 |
Total | 4,060 |  |  | 4,251 |
Less accumulated depreciation | (1,956) |  |  | (1,167) |
Property and equipment, net | $ | 2,104 |  |  | $ | 3,084 |
Schedule of Finite-Lived Intangible Assets | The estimated useful lives of our intangible assets are as follows (in years):
Developed technology | 4
Customer relationships | 3 | - | 5
Trademarks and trade names | 10
Other intangibles | 4
Internal-use software development costs and intangible assets consisted of the following (in thousands):
| December 31, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Internal-use software development costs | $ | 21,393 |  |  | $ | (6,957) |  |  | $ | 14,436 |
Intangible assets: |  |  |  |  |
Developed technology | $ | 196,128 |  |  | $ | (143,386) |  |  | $ | 52,742 |
Trademarks and trade names | 236,053 |  |  | (68,650) |  |  | 167,403 |
Software | 5,100 |  |  | (3,616) |  |  | 1,484 |
Customer relationships | 2,900 |  |  | (2,188) |  |  | 712 |
Total | $ | 440,181 |  |  | $ | (217,840) |  |  | $ | 222,341 |
| December 31, 2023
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Internal-use software development costs | $ | 13,788 |  |  | $ | (2,363) |  |  | $ | 11,425 |
Intangible assets: |  |  |  |  |
Developed technology | $ | 196,128 |  |  | $ | (94,354) |  |  | $ | 101,774 |
Trademarks and trade names | 236,053 |  |  | (45,050) |  |  | 191,003 |
Software | 5,100 |  |  | (2,341) |  |  | 2,759 |
Customer relationships | 2,900 |  |  | (1,435) |  |  | 1,465 |
Total | $ | 440,181 |  |  | $ | (143,180) |  |  | $ | 297,001 |
Amortization expense for internal-use software development costs and intangible assets were as follows (in thousands):
| For the Year Ended
| December 31, 2024 |  | December 31, 2023
Amortization expense for internal-use software development | $ | 4,594 |  |  | $ | 2,981 |
Amortization expense for intangible assets | $ | 74,660 |  |  | $ | 74,660 |
Schedule of Ownership Interest by Other Entities | The following table summarizes the ownership interest in System1 Holdings as of December 31, 2024, based on shares issued and outstanding.
| Units (in thousands) |  | Ownership Percentage
Class A units of S1 Holdings | 73,675 |  |  | 79.8 | %
Class B units of S1 Holdings | 18,695 |  |  | 20.2 | %

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