Fair Value Measurements - Liabilities at fair value on a recurring basis (Details) - Recurring basis - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value Measurements
Total financial liabilities	$ 26,260	$ 29,560
Series A warrant to purchase common stock
Fair Value Measurements
Total financial liabilities	20,560	23,100
Series C warrant to purchase common stock
Fair Value Measurements
Total financial liabilities	5,700	6,460
Level 3
Fair Value Measurements
Total financial liabilities	26,260	29,560
Level 3 \| Series A warrant to purchase common stock
Fair Value Measurements
Total financial liabilities	20,560	23,100
Level 3 \| Series C warrant to purchase common stock
Fair Value Measurements
Total financial liabilities	$ 5,700	$ 6,460

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.