Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2021

Schedule of Basic and Diluted Net Loss per Share Attributable to Common Stockholders

The numerator for basic and diluted net loss per share attributable to common stockholders is as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
Net loss attributable to common stockholders	$	(17,983	)	$	(21,246	)	$	(53,578	)	$	(66,927	)

The denominator is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Weighted average shares of common stock outstanding, basic and diluted		110,154,641		45,999,769		102,548,471		45,876,987
Weighted average shares of pre-funded warrants to purchase common stock		2,158,329		2,295,699		2,158,329		2,295,699
Total		112,312,970		48,295,468		104,706,800		48,172,686

Net loss per share attributable to common stockholders, basic and diluted is as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
Net loss per share attributable to common stockholders	$	(0.16	)	$	(0.44	)	$	(0.51	)	$	(1.39	)

Schedule of Antidilutive Securities Excluded from Calculation of Diluted Net Loss per Share Attributable to Common Stockholders

The following potential common stock equivalents, presented based on amounts outstanding at each period end, were excluded from the calculation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect for the nine months ended September 30:

	2021		2020
Options to purchase shares of common stock		5,851,431		3,324,885
Unvested shares of common stock		1,849		102,753
Unvested restricted stock units		391,269		1,254,545
		6,244,549		4,682,183