Basic and Diluted Net Loss per Common Share (Tables)

6 Months Ended

Jun. 30, 2018

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:



	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands, except per share amounts)	2018			2017			2018			2017
Numerator:
Net loss attributable to common stockholders	$	(61,833	)	$	(48,136	)	$	(111,751	)	$	(103,129	)
Denominator:
Weighted average common shares outstanding — basic and diluted	188,621,423			143,000,718			182,303,128			142,886,614

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:



	As of June 30,
(in thousands)	2018	2017
Options to purchase common stock	15,869	17,275
Convertible debt	40,850	40,850
Outstanding warrants, convertible to common stock	2,657	3,110
Unvested restricted stock units	3,556	2,826
Vested restricted stock units, unissued	111	50
Total number of potentially issuable shares	63,043	64,111