Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Summary of Stock-Based Compensation Expense

The stock-based compensation expense included in the Company’s condensed statement of operations and comprehensive loss for the three and six months ended June 30, 2022 and 2021 is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Research and development	$	2,181	$	1,138	$	3,736	$	2,082
General and administrative		2,606		1,015		4,628		1,637
	$	4,787	$	2,153	$	8,364	$	3,719

Summary of Stock Option Activity under 2019 Plan and 2021 Plan

The following table summarizes stock option activity under the 2019 Plan and the 2021 Plan for the six months ended June 30, 2022.

	Shares
Outstanding at December 31, 2021		11,216,275
Granted		11,847,783
Exercised		(212,453	)
Forfeited or canceled		(1,616,669	)
Outstanding at June 30, 2022		21,234,936
Exercisable at June 30, 2022		2,905,552