| Line Item | Jun 30, 2026 | Dec 31, 2025 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Dec 31, 2024 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Dec 31, 2023 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Dec 31, 2022 | Sep 30, 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Revenues, net | |||||||||||||||
| YoY growth | -14.1% | +8.2% | +41.2% | ||||||||||||
| Operating expenses | |||||||||||||||
| Banking and payments costs | |||||||||||||||
| Custody and trading costs | |||||||||||||||
| Compensation and benefits | |||||||||||||||
| Marketing expenses | |||||||||||||||
| Professional fees | |||||||||||||||
| Amortization expense | |||||||||||||||
| (Gain) loss on customer rewards liability | |||||||||||||||
| (Gain) loss on digital assets - rewards treasury | |||||||||||||||
| Other selling, general and administrative expenses | |||||||||||||||
| Total operating expenses | |||||||||||||||
| % of revenue | 227.6% | 165.3% | 180.3% | ||||||||||||
| Operating loss | |||||||||||||||
| Gain (loss) on digital assets - investment treasury | |||||||||||||||
| Change in fair value of SAFEs | |||||||||||||||
| Change in fair value of convertible note | |||||||||||||||
| Convertible note issuance costs and fees | |||||||||||||||
| Legal settlements | — | — | |||||||||||||
| Loss on extinguishment of debt | |||||||||||||||
| Interest expense | |||||||||||||||
| Other income | |||||||||||||||
| Other income (expense), net | |||||||||||||||
| Net income (loss) before income taxes | |||||||||||||||
| Net income (loss) | |||||||||||||||
| % of revenue | -158.5% | -379.9% | 7.5% | ||||||||||||
| Net income (loss) per share attributable to common stockholders: | |||||||||||||||
| Basic | — | ||||||||||||||
| Diluted | — | ||||||||||||||
| Net income (loss) attributable to common stockholders: | |||||||||||||||
| Basic | — | ||||||||||||||
| Diluted | — |