Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

A summary of stock option activity during the three months ended March 31, 2021 is as follows:

	Number of Units Outstanding			Weighted Average Strike Price per Unit		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2020		7,737,095		$	4.22		9.3	$	16,374
Granted		433,360		$	15.48
Exercised		(85,895	)	$	1.50
Forfeited/Expired		(45,138	)	$	3.62
Outstanding at March 31, 2021		8,039,422		$	4.86		9.1	$	65,470
Exercisable at March 31, 2021		1,179,385		$	1.83		8.1	$	12,998
Nonvested at March 31, 2021		6,860,037		$	5.38		9.3	$	52,472

Components of Stock-based Compensation Expense

The following table summarizes the components of stock-based compensation expense recorded in the Company’s statement of operations and comprehensive loss (in thousands):

	Three months ended March 31,
	2021		2020
Research and development	$	623	$	274
Selling, general and administrative		1,149		407
Total stock-based compensation	$	1,772	$	681