Stock‑Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Stock‑Based Compensation

Schedule of stock option activity

		Weighted‑		Weighted‑
		Average		Average	Aggregate
	Number of	Exercise		Contractual	Intrinsic
	Shares	Price		Term	Value
				(in years)	(in thousands)
Outstanding as of December 31, 2019	961,751	$	1.69	9.5	$	524
Granted	1,989,654		8.67
Exercised	(32,511)		1.27
Forfeited	(57,766)		3.32
Outstanding as of September 30, 2020	2,861,128	$	6.54	9.2	$	46,726
Vested and expected to vest as of September 30, 2020	2,861,128	$	6.54	9.2	$	46,726
Options exercisable as of September 30, 2020	349,736	$	3.58	8.6	$	6,745

Schedule of unvested common stock from option early exercises

	Shares
Unvested restricted common stock as of December 31, 2019	102,896
Vested	(48,615)
Unvested restricted common stock as of September 30, 2020	54,281

Schedule of restricted common stock award activity

		Weighted‑
		Average
		Grant‑Date
	Shares	Fair Value
Unvested restricted common stock as of December 31, 2019	209,742	$	0.0443
Vested	(87,986)		0.0400
Unvested restricted common stock as of September 30, 2020	121,756	$	0.0500

Schedule of stock based compensation expense

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2020		2019		2020		2019
Research and development expenses	$	399	$	12	$	617	$	30
General and administrative expenses		1,677		9		2,060		27
	$	2,076	$	21	$	2,677	$	57