Interim Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of interim financial data (unaudited)

	2015
	Q1			Q2			Q3			Q4			Total
Revenue	$	4,682		$	3,440		$	4,065		$	12,686		$	24,873
Loss from operations	(18,006		)	(14,420		)	(58,138		)	(11,758		)	(102,322		)
Net loss	$	(11,989	)	$	(14,886	)	$	(28,982	)	$	(5,264	)	$	(61,121	)
Basic and diluted net loss per share	$	(0.40	)	$	(0.27	)	$	(0.57	)	$	(0.10	)	$	(1.34	)

	2014
	Q1			Q2			Q3			Q4			Total
Revenue	$	4,430		$	1,811		$	4,362		$	4,350		$	14,953
Loss from operations	(5,958		)	(9,423		)	(6,844		)	(10,747		)	(33,434		)
Net loss	$	(17,984	)	$	(6,081	)	$	(8,604	)	$	(6,168	)	$	(38,837	)
Basic and diluted net loss per share	$	(0.91	)	$	(0.28	)	$	(0.39	)	$	(0.27	)	$	(1.80	)