Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Data (unaudited)

Summary of the unaudited quarterly financial data

The following tables summarize the unaudited quarterly financial data for the last two fiscal years (in thousands, except per share data):

	2014 Quarter Ended
	March 31,		June 30,		September 30,		December 31,
Total revenue	$	—	$	—	$	—	$	—
Loss from operations		(10,160)		(9,534)		(7,709)		(9,315)
Net loss		(10,408)		(9,814)		(8,063)		(9,713)
Basic and diluted net loss per common share	$	(0.32)	$	(0.30)	$	(0.24)	$	(0.29)
Weighted average common shares outstanding used to calculate basic and diluted net loss per common share		32,966,471		32,981,396		32,981,725		32,987,354

	2013 Quarter Ended
	March 31,		June 30,		September 30,		December 31,
Total revenue	$	16	$	15	$	9	$	4
Loss from operations		(8,323)		(11,571)		(11,087)		(9,928)
Net loss		(8,574)		(11,809)		(11,329)		(10,236)
Basic and diluted net loss per common share	$	(0.55)	$	(0.49)	$	(0.47)	$	(0.31)
Weighted average common shares outstanding used to calculate basic and diluted net loss per common share		15,607,379		24,189,819		24,263,745		32,925,194