Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 2018

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, 2018, 2017, and 2016, 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 0.3 million restricted stock units for the year ended December 31, 2018, 0.7 million stock options, before they were converted into common shares during 2017, and 0.7 million restricted stock units for the year ended December 31, 2017, and 0.7 million stock options and 0.8 million restricted stock units for the year ended December 31, 2016.

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



	Year ended December 31,
	2018	2017	2016
Weighted average common shares outstanding - Basic	57,995	57,580	56,087
Assumed conversions:
Incremental common shares from stock options	—	—	—
Incremental common shares from restricted stock units	—	—	—
Weighted average common shares outstanding - Diluted	57,995	57,580	56,087