Stock-based compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of stock-based compensation expense

Stock-based compensation expense for the three and six months ended June 30, 2023 and 2022 was classified in the Company’s condensed consolidated statement of operations and comprehensive loss as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Stock-based compensation expense:
Research and development	$	2,644	$	3,776	$	5,227	$	7,388
General and administrative	3,781		4,372		7,449		9,698
Total stock-based compensation expense	$	6,425	$	8,148	$	12,676	$	17,086

Summary of RSU activity

The following table summarizes the Company’s RSU activity for the six months ended June 30, 2023:

	Shares	Weighted-Average Grant Date Fair Value
Outstanding as of December 31, 2022	—	$	—
Issued	724,500	5.68
Vested	—	—
Forfeited	(37,360)	$	5.67
Outstanding as of June 30, 2023	687,140	$	5.68

As of June 30, 2023, the unrecognized compensation cost related to outstanding RSUs was $3.5 million, which is expected to be recognized over a weighted-average period of 3.6 years.