Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Selected Quarterly Financial Data (Unaudited)

14. Selected Quarterly Financial Data (Unaudited)

The following table contains quarterly financial information for 2015 and 2014. The Company believes that the following information reflects all normal recurring adjustments necessary for a fair statement of the information for the periods presented. The operating results for any quarter are not necessarily indicative of results for any future period.

	2015
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Total
Total operating expenses	$	8,167		$	12,340		$	14,561		$	19,788		$	54,856
Loss from operations		(8,167	)		(12,340	)		(14,561	)		(19,788	)		(54,856	)
Net loss		(7,971	)		(12,555	)		(14,620	)		(19,634	)		(54,780	)
Net loss per share applicable to common    stockholders - basic and diluted	$	(1.15	)	$	(1.45	)	$	(0.38	)	$	(0.50	)	$	(2.33	)

	2014
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Total
Total operating expenses	$	1,672		$	2,618		$	3,579		$	7,213		$	15,082
Loss from operations		(1,672	)		(2,618	)		(3,579	)		(7,213	)		(15,082	)
Net loss		(1,689	)		(2,677	)		(4,161	)		(8,182	)		(16,709	)
Net loss per share applicable to common    stockholders - basic and diluted	$	(0.29	)	$	(0.45	)	$	(0.68	)	$	(1.24	)	$	(2.67	)