Basic earnings (loss) per share is computed using the weighted average number of common shares outstanding during the period and income available to common stockholders. Diluted earnings (loss) per share is computed using the weighted average number of common shares outstanding during the period plus the dilutive effect of all potential shares of common stock including common stock issuable pursuant to stock options, warrants, and RSUs. Earnings (loss) per share for continuing operations and discontinued operations are computed independently. As a result, the sum of per share amount may not equal the total.

 

For the years ended December 31, 2018 and 2017, the earnings (loss) per share was calculated as follows (in thousands, except earnings (loss) per share and related share data):

 

 

For the year ended December 31, 2018, 1.4 million stock options, warrants and restricted share units were determined to be anti-dilutive and were therefore excluded from the calculation of diluted earnings per share. For the year ended December 31, 2017, all equivalent shares underlying options, warrants and restricted share units were excluded from the calculation of diluted earnings per share because the Company was in a net loss position.

 

Basic and diluted earnings (loss) per share for continuing operations and discontinued operations was ($0.18) and $0.02 for the year ended December 31, 2017. There was no activity from discontinued operations for the year ended December 31, 2018.