Summary of Significant Accounting Policies - Schedule of Contract Blances (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Summary of Significant Accounting Policies - Schedule of Contract Blances (Details) [Line Items] | ||
| Short-term contract liabilities | $ 62 | $ 109 |
| Location, Statement of Financial Position, Balance [Axis]: rtb:DirectAdvertisingRevenueMember | ||
| Summary of Significant Accounting Policies - Schedule of Contract Blances (Details) [Line Items] | ||
| Short-term contract liabilities | 13 | 0 |
| Location, Statement of Financial Position, Balance [Axis]: rtb:NonadvertisingServiceRevenueMember | ||
| Summary of Significant Accounting Policies - Schedule of Contract Blances (Details) [Line Items] | ||
| Short-term contract liabilities | $ 49 | $ 109 |