Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Options Activity

The following summarizes stock option activity:

	Number of Shares			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
Outstanding at January 1, 2020		3,911,633		$	1.50		8.5	$	3,915
Granted		3,408,861		$	6.38
Exercised		(18,747	)	$	1.43
Cancelled		(300,000	)	$	6.83
Outstanding at September 30, 2020		7,001,747		$	3.65		8.7	$	22,406
Options exercisable at September 30, 2020		2,857,918		$	1.47		7.4	$	15,371
Vested or expected to vest at September 30, 2020		7,001,747		$	3.65		8.7	$	22,406

Schedule of Stock-based Compensation Expense

Stock-based compensation expense is classified as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Research and development expense	$	2,469	$	63	$	2,627	$	188
General and administrative		1,769		94		2,009		262
Total stock-based compensation expense	$	4,238	$	157	$	4,636	$	450