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Basic and Diluted Earnings Per Share

6 Months Ended

Jun. 30, 2021

Note 11. Basic and Diluted Earnings Per Share

Basic net loss attributable to common stockholders per share is computed by dividing the net loss by the weighted average number of common stock outstanding for the period. For periods in which we have reported net losses, diluted net loss per share attributable to common stockholders is the same as basic net loss per share, since the impact of potentially dilutive common stock and other equity instruments is anti-dilutive.

The following table presents the number of options, restricted stock units and restricted stock excluded from the calculation of diluted net loss per share attributable to common stockholders because they are anti-dilutive (in thousands):


	June 30,
	2021		2020
Options to purchase common stock		15,666		12,134
Restricted stock units		3,795		1,030
Restricted stock		50		100

Total		19,511		13,264