Net Loss Per Common Share (Tables)

9 Months Ended

Sep. 30, 2019

Net Loss Per Common Share

Shares Outstanding Excluded from Calculation 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 Nine months ended September 30,
	2019	2018
Common shares under option plans	2,460	3,381
Convertible senior notes	41,598	8,584
Total potential dilutive shares	44,058	11,965