Stock-Based Compensation - Stock option activity (Details) - Stock option - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Number of Shares
Outstanding as at beginning of period (in shares)			4,392,836
Granted (in shares)	0		1,885,975
Exercised (in shares)			(161,427)
Forfeited and cancelled (in shares)			(404,117)
Outstanding as at end of period (in shares)	5,713,267		5,713,267		4,392,836
Vested and expected to vest as at end of period (in shares)	5,713,267		5,713,267
Options exercisable as at end of period (in shares)	2,130,324		2,130,324
Weighted Average Exercise Price
Weighted average exercise price outstanding as at beginning of period (in dollars per share)			$ 11.71
Weighted average exercise price, Granted (in dollars per share)			5.44
Weighted average exercise price, Exercised (in dollars per share)			1.84
Weighted average exercise price, Forfeited and cancelled (in dollars per share)			12.43
Weighted average exercise price, Outstanding as at end of period (in dollars per share)	$ 9.89		9.89		$ 11.71
Vested and expected to vest as at end of period (in dollars per share)	9.89		9.89
Options exercisable as at end of period (in dollars per share)	$ 10.79		$ 10.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Contractual term, Outstanding (in years)			8 years 2 months 12 days		8 years 3 months 18 days
Contractual term, Vested and expected to vest (in years)			8 years 2 months 12 days
Contractual term, Options exercisable (in years)			7 years 3 months 18 days
Average intrinsic value, Outstanding	$ 5,408		$ 5,408		$ 6,801
Average intrinsic value, Vested and expected to vest	5,408		5,408
Average intrinsic value, Exercisable	$ 2,500		$ 2,500
Weighted-average grant-date fair value of stock options granted		$ 8.24	$ 3.86	$ 11.12