Fair Value of Measurements - Schedule of Financial Instruments are Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value of Measurements
Convertible promissory notes	$ 5,123	$ 4,947
Warrant liabilities	3,111	3,750
Common stock forward liability	20	315
Level 3
Fair Value of Measurements
Convertible promissory notes	5,123	4,947
Warrant liabilities	3,111	3,750
Common stock forward liability	$ 20	$ 315