Net Loss Per Common Share

6 Months Ended

Jun. 30, 2020

Net Loss Per Common Share

Net Loss Per Common Share

14. Net Loss Per Common Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed by dividing net loss by the weighted-average number of common share equivalents outstanding using the treasury-stock method for the stock options and RSUs and the if-converted method for the 2021 Notes, 2025 Notes and 2024 Notes. As a result of our net losses for the periods presented, all potentially dilutive common share equivalents were considered anti-dilutive and were excluded from the computation of diluted net loss per share.

The shares outstanding at the end of the respective periods presented in the table below were excluded from the calculation of diluted net loss per share due to their anti-dilutive effect (in thousands):

	Three and six months ended June 30,
	2020	2019
Common shares under option plans	4,156	3,133
Convertible senior notes	25,648	8,584
Total potential dilutive shares	29,804	11,717