10-Q Share-based compensation - RSU activity (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Weighted-Average Grant Date Fair Value | ||||||||
| SVS withheld to satisfy statutory tax withholding obligations | [1],[2] | $ 6,444,000 | ||||||
| Restricted stock units | ||||||||
| Number of Shares | ||||||||
| Unvested, beginning (in shares) | 8,848,666 | 2,111,261 | 2,048,653 | 1,428,146 | ||||
| Forfeited (in shares) | (250,267) | (798,159) | (819,826) | (583,199) | ||||
| Vested (in shares) | (1,995,496) | (872,741) | (1,076,186) | (533,768) | ||||
| Granted (in shares) | 1,251,755 | 8,408,305 | 1,958,620 | 1,737,474 | ||||
| Unvested, ending (in shares) | 7,854,658 | 8,848,666 | 2,111,261 | 2,048,653 | ||||
| Inception-to-date vested (in shares) | 5,888,702 | 3,893,206 | 3,020,465 | 1,944,279 | ||||
| Weighted-Average Grant Date Fair Value | ||||||||
| Unvested, beginning (in dollars per share) | $ 4.830 | $ 10.890 | $ 12.360 | $ 22.320 | ||||
| Forfeited (in dollars per share) | 5.040 | 6.270 | 12.180 | 16.980 | ||||
| Vested (in dollars per share) | 4.530 | 11.640 | 12.990 | 23.310 | ||||
| Granted (in dollars per share) | 6.750 | 4.170 | 11.040 | 9.090 | ||||
| Unvested, ending (in dollars per share) | 5.220 | 4.830 | 10.890 | 12.360 | ||||
| Inception-to-date vested (in dollar per share) | $ 13.290 | $ 17.760 | $ 19.530 | $ 23.140 | ||||
| Restricted stock units | SVS | ||||||||
| Weighted-Average Grant Date Fair Value | ||||||||
| SVS withheld to satisfy statutory tax withholding obligations (in shares) | 599,537 | |||||||
| SVS withheld to satisfy statutory tax withholding obligations | $ 7.080 | |||||||
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