The following table presents the computation of basic earnings (loss) per share (in thousands, except per share amounts):



	Three Months Ended				Six Months Ended
	December 24, 2017		December 25, 2016		December 24, 2017			December 25, 2016
Net income (loss)		$13,721		$6,216		($6,136	)		$6,783
Weighted average common shares	99,184		98,467		98,499			99,513
Basic earnings (loss) per share		$0.14		$0.06		($0.06	)		$0.07

The following computation reconciles the differences between the basic and diluted earnings (loss) per share presentations (in thousands, except per share amounts):



	Three Months Ended				Six Months Ended
	December 24, 2017		December 25, 2016		December 24, 2017			December 25, 2016
Net income (loss)		$13,721		$6,216		($6,136	)		$6,783
Weighted average common shares - basic	99,184		98,467		98,499			99,513
Dilutive effect of stock options, nonvested shares and Employee Stock Purchase Plan purchase rights	1,579		263		—			481
Weighted average common shares - diluted	100,763		98,730		98,499			99,994
Diluted earnings (loss) per share		$0.14		$0.06		($0.06	)		$0.07

Potential common shares that would have the effect of increasing diluted earnings per share or decreasing diluted loss per share are considered to be anti-dilutive and as such, these shares are not included in calculating diluted earnings per share. For the three and six months ended December 24, 2017, there were 4.1 million and 5.8 million, respectively, of potential common shares not included in the calculation of diluted earnings (loss) per share because their effect was anti-dilutive. For the three and six months ended December 25, 2016, there were 12.1 million and 11.5 million, respectively, of potential common shares not included in the calculation of diluted earnings (loss) per share because their effect was anti-dilutive.