Stock-based compensation - Summary of Restricted Stock Units (Detail) - Restricted stock units shares in Thousands	6 Months Ended
	Jun. 30, 2023 $ / shares shares
Shares (in thousands)
Unvested balance at beginning of period (in shares) | shares	2,415
Granted (in shares) | shares	2,943
Vested (in shares) | shares	(420)
Forfeited (in shares) | shares	(301)
Unvested balance at end of period (in shares) | shares	4,637
Weighted- average grant date fair value
Unvested balance at beginning of period (in dollars per share) | $ / shares	$ 11.44
Granted (in dollars per share) | $ / shares	4.97
Vested (in dollars per share) | $ / shares	17.11
Forfeited (in dollars per share) | $ / shares	9.10
Unvested balance at end of period (in dollars per share) | $ / shares	$ 7.25