Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Significant Accounting Policies

Schedule of prepaid expenses and other current assets

	December 31,
	2020		2019
Prepaid research and development costs	$	5,828	$	6,438
Other current assets		3,048		3,507
Prepaid expenses and other current assets	$	8,876	$	9,945

Schedule of property, plant and equipment

	Useful	December 31,
	Life	2020		2019
Leasehold improvements	*	$	2,705	$	2,705
Office equipment	5 years		70		70
Computers and software	3 years		625		411
Furniture, fixtures and equipment	5 years		1,237		1,237
			4,637		4,423
Less accumulated depreciation and amortization			(1,442)		(752)
Property and equipment, net		$	3,195	$	3,671

*Shorter of asset life or lease term.

Schedule of potential common shares, presented based on amounts outstanding at each period end, excluded from computation of diluted net loss per share attributable to common stockholders

	Year Ended
	December 31,
	2020		2019		2018
Stock options		5,199,235		3,428,497		2,616,530
Restricted stock units		176,537		—		—
Potential common shares		5,375,772		3,428,497		2,616,530