Note 8 — Income (Loss) Per Share

The following table is a reconciliation of the weighted average shares used in the computation of income (loss) per share for the periods presented (in thousands, except per share data):

	Three Months Ended June 30,
	2018								2017
	Income (Loss)			Weighted Average Shares		Per-Share			Income (Loss)			Weighted Average Shares		Per-Share
Income (loss) per share — basic and diluted
Net income (loss) available to common stockholders	$	(18,559	)		23,106	$	(0.80	)	$	(16,742	)		21,616	$	(0.77	)

	Six Months Ended June 30,
	2018								2017
	Income (Loss)			Weighted Average Shares		Per-Share			Income (Loss)			Weighted Average Shares		Per-Share
Income (loss) per share — basic and diluted
Net income (loss) available to common stockholders	$	(54,803	)		23,103	$	(2.37	)	$	(35,058	)		19,865	$	(1.77	)

Basic income (loss) per share is calculated using the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated using the weighted average number of common shares and common share equivalents outstanding during the period (which consist of warrants, options, restricted stock awards, restricted stock units and convertible debt to the extent they are dilutive). The weighted average number of common shares outstanding excludes shares repurchased pursuant to a prepaid forward share repurchase agreement associated with the issuance of the convertible senior notes due 2020. Common share equivalents that could potentially dilute basic earnings per share in the future, which were excluded from the computation of diluted earnings per share due to being anti-dilutive, totaled approximately 25,268,205 and 21,405,998 for the three months ended June 30, 2018 and 2017, respectively, and 25,268,205 and 22,160,979 for the six months ended June 30, 2018 and 2017, respectively.