Net Loss Per Share Attributable to Common Stockholders

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Net Loss Per Share Attributable to Common Stockholders

10. Net Loss Per Share Attributable to Common Stockholders

Basic and diluted net loss per common share is calculated as follows (in thousands except share and per share amounts):

	Year Ended December 31,
	2021			2020
Net loss	$	(35,821	)	$	(27,531	)
Cumulative dividends on convertible preferred stock		—			(7,189	)
Net loss attributable to common stockholders	$	(35,821	)	$	(34,720	)
Net loss per common share—basic and diluted	$	(1.69	)	$	(5.25	)
Weighted-average number of shares used in computing net    loss per common share—basic and diluted		21,199,291			6,618,445

The following outstanding potentially dilutive shares have been excluded from the calculation of diluted net loss per share due to their anti-dilutive effect:

	As of December 31,
	2021		2020
Stock options to purchase common stock		3,777,398		2,756,102
Restricted stock units		969,700		80,000
Warrants to purchase common stock		27,759		27,759