Stock Based Compensation - Summary of option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Number of Shares
Outstanding at beginning of period	24,264,016
Granted	6,324,127
Exercised	(5,141,728)
Forfeited or expired	(4,840,722)
Outstanding at end of period	20,605,693	24,264,016
Exercisable	12,275,078	16,662,487
Weighted-average Exercise Price
Outstanding at beginning of period	$ 2.53
Granted	1.59
Exercised	0.05
Forfeited or expired	3.26
Outstanding at end of period	2.45	$ 2.53
Exercisable	$ 2.48	$ 1.99
Weighted-average Remaining Contractual Term (in years)
Weighted average remaining contractual term	6 years 8 months 4 days	7 years 10 days
Exercisable	5 years 3 months 7 days	4 years 10 months 13 days
Cash received from exercise of stock options	$ 273	$ 220
Aggregate intrinsic value of exercisable option	9,427
Aggregate intrinsic value of exercised options	7,282	70,115
Aggregate intrinsic value of options outstanding	12,008
2014 and 2021 Equity Incentive Plan
Weighted-average Remaining Contractual Term (in years)
Cash received from exercise of stock options	$ 273	$ 220
2014 Plan
Number of Shares
Outstanding at beginning of period	17,134,781
Outstanding at end of period	11,241,546	17,134,781