Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Selected Quarterly Financial Data (Unaudited)

Schedule of unaudited quarterly financial data

	2014
	March 31			June 30			September 30			December 31
	(in thousands, except share and per share data)
Operating expenses:
Research and development	$	5,400		$	6,528		$	7,174		$	6,200
General and administrative		2,490			2,726			2,526			3,180
Total operating expenses		7,890			9,254			9,700			9,380
Loss from operations:		(7,890	)		(9,254	)		(9,700	)		(9,380	)
Interest expense		—			(1	)		(135	)		(134	)
Change in fair value of warrant liability		—			—			—			—
Other income (expense), net		16			17			29			57
Net loss	$	(7,874	)	$	(9,238	)	$	(9,806	)	$	(9,457	)
Net loss per common share (basic and diluted)	$	(0.51	)	$	(0.60	)	$	(0.64	)	$	(0.49	)
Weighted-average shares outstanding (basic and diluted)		15,369,055			15,399,018			15,432,641			19,276,639

	2013
	March 31			June 30			September 30			December 31
Operating expenses:
Research and development	$	2,093		$	3,100		$	3,483		$	7,338
General and administrative		1,251			1,172			1,924			2,398
Total operating expenses		3,344			4,272			5,407			9,736
Loss from operations:		(3,344	)		(4,272	)		(5,407	)		(9,736	)
Interest expense		(828	)		(108	)		—			—
Change in fair value of warrant liability		(42	)		(2,545	)		—			—
Other income (expense), net		(25	)		4			169			46
Net loss	$	(4,239	)	$	(6,921	)	$	(5,238	)	$	(9,690	)
Net loss per common share (basic and diluted)	$	(12.24	)	$	(19.82	)	$	(0.34	)	$	(0.63	)
Weighted-average shares outstanding (basic and diluted)		346,478			349,170			15,253,704			15,340,713