Net Loss per Common Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Net Loss per Common Share

11. Net Loss per Common Share

Since the Company was in a loss position for all periods presented, diluted net loss per share is the same as basic net loss per share for all periods as the inclusion of all potential common shares outstanding would have been anti-dilutive.

Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands):

	December 31,
	2021		2020		2019
Options to purchase common stock		8,324		8,637		6,513
Employee stock plan purchases		41		21		19
Employee restricted stock units		716		—		—
Conversion of Series A preferred    stock into shares of common stock		17,157		—		—
Total		26,238		8,658		6,532