Stock-Based Compensation - Stock option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Options Outstanding
Outstanding at beginning of period (in shares)	7,455,795
Granted (in shares)	2,581,453
Exercised (in shares)	(8,766)
Cancelled/forfeited (in shares)	(1,694,550)
Outstanding at end of period (in shares)	8,333,932	7,455,795
Exercisable at end of period (in shares)	4,132,222
Weighted Average Exercise Price
Outstanding (in dollars per share)	$ 4.15	$ 5.52
Granted (in dollars per share)	0.86
Exercised (in dollars per share)	0.55
Cancelled/forfeited (in dollars per share)	5.18
Exercisable at end of period (in dollars per share)	$ 5.9
Weighted Average Remaining Contractual Term (In years)
Outstanding (in years)	8 years	8 years
Exercisable at end of period (in years)	7 years 1 month 6 days
Aggregate Intrinsic Value
Outstanding (in dollars)	$ 282
Exercisable (in dollars)	$ 39