Noncontrolling Interests - Summary Ownership of Viant Technology LLC (Details) - Viant Technology LLC - shares |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Mar. 31, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Minority Interest [Line Items] | |||
| Units Owned (shares) | 63,824,218 | 63,310,414 | |
| Units Owned, Noncontrolling Interest (shares) | 45,559,716 | 45,717,216 | |
| Ownership percentage by non-controlling interests | 71.40% | 72.20% | |
| Ownership Percentage | 100.00% | 100.00% | |
| Viant Technology Inc. | |||
| Minority Interest [Line Items] | |||
| Units Owned (shares) | 18,264,502 | 17,593,198 | |
| Ownership percentage by Viant Technology Inc. | 28.60% | 27.80% |