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NET INCOME (LOSS) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Net Income (Loss) Per Share

Net income (loss) per share was calculated as follows:

	Year Ended December 31,
(in thousands, except per share data)	2018				2017				2016
Net income (loss) - basic and diluted	$	21,111			$	(142,542	)		$	(141,090	)
Weighted-average common shares outstanding:
Basic		90,235				88,089				86,713
Effect of dilutive securities:
Employee stock purchase program		11				—				—
Stock options		3,228				—				—
Restricted stock units		564				—				—
2024 Notes		1,348				—				—
Diluted		95,386				88,089				86,713
Net income (loss) per share:
Basic	$	0.23			$	(1.62	)		$	(1.63	)
Diluted	$	0.22			$	(1.62	)		$	(1.63	)

Schedule of Anti-Dilutive Shares Excluded from Diluted Per Share Amounts

Shares which have been excluded from diluted per share amounts because their effect would have been anti-dilutive include the following:

	Year Ended December 31,
(in thousands)	2018				2017				2016
Stock options and restricted stock units		887				7,436				6,995

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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