Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data (Unaudited)

The following table summarizes unaudited quarterly financial data for the years ended December 31, 2015 and 2014 (in thousands, except per share data).

	2015
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Total
Revenues	$	-		$	-		$	-		$	-		$	-
Operating loss	$	(26,706	)	$	(27,952	)	$	(30,245	)	$	(32,590	)	$	(117,493	)
Net loss	$	(27,369	)	$	(28,607	)	$	(30,962	)	$	(31,245	)	$	(118,183	)
Basic and diluted net loss per share	$	(0.55	)	$	(0.47	)	$	(0.50	)	$	(0.51	)	$	(2.02	)

	2014
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Total
Revenues	$	-		$	-		$	-		$	-		$	-
Operating loss	$	(18,079	)	$	(22,816	)	$	(23,404	)	$	(23,066	)	$	(87,365	)
Net loss	$	(14,298	)	$	(23,224	)	$	(23,990	)	$	(17,647	)	$	(79,159	)
Basic and diluted net loss per share	$	(0.36	)	$	(0.59	)	$	(0.54	)	$	(0.36	)	$	(1.84	)