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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings per share

Schedule of computation of basic and diluted net loss per share for common stockholders

		Year ended December 31,
		2015			2014			2013
Numerator
Net loss		$	(170,447	)	$	(93,753	)	$	(51,574	)
Deemed dividend			—			—			(18,249	)
Gain on exchange of convertible preferred stock in connection with recapitalization			—			—			3,391
​	​	​	​	​	​	​	​	​	​	​
Net loss attributable to common stockholders		$	(170,447	)	$	(93,753	)	$	(66,432	)
​	​	​	​	​	​	​	​	​	​	​
Denominator
Denominator for basic and diluted net loss per share			33,626,248			31,565,310			12,829,411
​	​	​	​	​	​	​	​	​	​	​
Net loss per share:
Basic and diluted		$	(5.07	)*	$	(2.97	)*	$	(5.18	)*
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

*           For the years ended December 31, 2015, 2014, and 2013, the Company experienced a net loss and therefore did not report any dilutive share impact.

Schedule of historical dilutive common share equivalents outstanding

		As of December 31,
		2015			2014			2013
Stock Options			4,826,477			3,432,972			2,095,592
Unvested restricted stock			344,335			718,400			1,110,226
​	​	​	​	​	​	​	​	​	​	​
Total			5,170,812			4,151,372			3,205,818
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

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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://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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