Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 2019

Basic earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding combined with dilutive common share equivalents outstanding, if the effect is dilutive.

Potentially dilutive securities were excluded from the calculation of diluted loss per share for the years ended December 31, 2019, 2018, and 2017, since including them

would have an anti-dilutive effect on loss per share due to the loss from continuing operations incurred during the period. Securities convertible into shares of common stock that were not considered in the diluted loss per share calculations were 0.1 million restricted stock units and 3.0 million stock options for the year ended December 31, 2019, and 0.7 million restricted stock units for the year ended December 31, 2018, and 0.7 million stock options and 0.8 million restricted stock units for the year ended December 31, 2017.

A reconciliation of the number of shares used for the basic and diluted earnings (loss) per common share computations is as follows (in thousands):



	Years ended December 31,
	2019	2018	2017
Weighted average common shares outstanding - Basic	58,750	57,995	57,580
Assumed conversions:
Incremental common shares from stock options	—	—	—
Incremental common shares from restricted stock units	—	—	—
Weighted average common shares outstanding - Diluted	58,750	57,995	57,580