(14) NET LOSS PER COMMON SHARE

Potentially issuable shares of common stock include shares issuable upon the exercise of outstanding employee stock option awards, common stock issuable under the Company’s ESPP, unvested restricted stock units (RSUs), common stock held by the NQDC and contingent issuances of common stock related to convertible debt.

The following table sets forth the computation of basic and diluted earnings per common share (in thousands of common shares):

	Years Ended December 31,
	2017			2016			2015
Numerator:
Net loss, basic	$	(117,042	)	$	(630,210	)	$	(171,799	)
Less: gain on common stock held by the NQDC		—			(3,184	)		—
Net loss, diluted		(117,042	)		(633,394	)		(171,799	)
Denominator:
Weighted-average common shares outstanding, basic		174,427			165,985			160,025
Effect of dilutive securities:
Common stock held by the NQDC		—			234			—
Weighted-average common shares outstanding, diluted		174,427			166,219			160,025
Net loss per common share, basic	$	(0.67	)	$	(3.80	)	$	(1.07	)
Net loss per common share, diluted	$	(0.67	)	$	(3.81	)	$	(1.07	)

The table below presents potential shares of common stock that were excluded from the computation of basic and diluted earnings per common share as they were anti-dilutive using the if-converted or treasury stock method (in thousands):

	Years Ended December 31,
	2017		2016		2015
Options to purchase common stock		8,108		8,856		10,323
Common stock issuable under the 2017 Notes		—		1,105		1,544
Common stock issuable under the 2018 Notes		3,983		3,983		3,983
Common stock issuable under the 2020 Notes		3,983		3,983		3,983
Common stock issuable under the 2024 Notes		3,970		—		—
Unvested restricted stock units		2,911		2,618		1,743
Common stock potentially issuable for ESPP purchases		436		404		312
Common stock held by the NQDC		220		—		243
Total number of potentially issuable shares		23,611		20,949		22,131

The potential effect of the capped call transactions with respect to the 2018 Notes and the 2020 Notes was excluded from the diluted net income/loss per share as the Company’s closing stock price on December 31, 2017 and 2016 did not exceed the conversion price of $94.15 per share for the 2018 Notes and the 2020 Notes. Although the Company’s stock price exceeded the conversion price $94.15 at December 31, 2015, the potential shares issuable under the 2018 Notes and the 2020 Notes were excluded from the calculation of diluted loss per share as they were anti-dilutive using the if-converted method. There is no similar capped call transaction associated with the 2024 Notes. See Note 13 to these Consolidated Financial Statements for information on the Company’s debt.