Stock-Based Compensation - Stock options (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Options
Outstanding at beginning of period (in shares)	4,178,194	4,408,274	4,408,274
Granted (in shares)	2,520,450	2,257,506
Exercised (in shares)	(366,947)	(1,239,899)
Cancelled (in shares)	(163,259)	(1,006,332)
Outstanding at end of period (in shares)	6,168,438	4,419,549	4,178,194	4,408,274
Vested at end of period (in shares)	2,356,788	2,132,303
Vested and expected to vest at end of period (in shares)	6,168,438	4,419,549
Weighted average exercise price
Outstanding at beginning of period (in dollars per share)	$ 2.98	$ 3.44	$ 3.44
Granted (in dollars per share)	3.02	1.08
Exercised (in dollars per share)	1.33	1.18
Cancelled (in dollars per share)	2.63	2.73
Outstanding at end of period (in dollars per share)	3.10	3.03	$ 2.98	$ 3.44
Vested at end of period (in dollars per share)	3.61	3.34
Vested and expected to vest at end of period (in dollars per share)	$ 3.10	$ 3.03
Weighted-average remaining contractual term and Aggregate intrinsic value
Outstanding at end of period (in years)	8 years 7 months 9 days	8 years 8 months 12 days	8 years 2 months 19 days	8 years 6 months 7 days
Vested at end of period (in years)		5 years 4 months 13 days
Vested and expected to vest at end of period (in years)	8 years 7 months 9 days	8 years 8 months 12 days
Outstanding at beginning of period (in dollars)	$ 11	$ 350	$ 350
Outstanding at end of period (in dollars)	3,751	1,454	$ 11	$ 350
Vested at end of period (in dollars)	1,976	476
Vested and expected to vest at end of period (in dollars)	$ 3,751	$ 1,454
Weighted average grant-date fair value of stock options granted	$ 2.05	$ 0.63