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Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings per Share

Schedule of reconciliation of the numerator and denominator used in computing basic and diluted net loss per common share

        The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss attributable to common stockholders per common share (in thousands except share amounts):

		Years Ended December 31,
Historical		2017			2016			2015
Numerator:
Net loss attributable to common stockholders		$	(284,002	)	$	(200,042	)	$	(132,118	)
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Denominator:
Weighted average common shares outstanding — basic and diluted			153,355,144			134,401,588			109,923,815
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Schedule of potential shares of common stock that were excluded from the computation as they were anti-dilutive using the treasury stock method

        The table below presents potential shares of common stock that were excluded from the computation as they were anti-dilutive using the treasury stock method (in thousands):

		Year ended December 31,
		2017			2016			2015
Options to purchase common stock			15,181			15,528			11,729
Convertible debt			40,850			40,850			—
Outstanding warrants, convertible to common stock			3,110			3,110			1,350
Unvested restricted stock units			2,575			744			479
Vested restricted stock units, unissued			50			—			—
​	​	​	​	​	​	​	​	​	​	​
Total number of potentially issuable shares			61,766			60,232			13,558
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

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- References

No definition available.

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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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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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