Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2016

Selected Quarterly Financial Information [Abstract]

Selected Quarterly Financial Data (Unaudited)

18.  Selected Quarterly Financial Data (Unaudited)

Selected quarterly results from operations for the years ended December 31, 2016 and 2015 are as follows (in thousands, except per share amounts):

	2016 Quarter Ended
	March 31,			June 30,			September30,			December31,
Grant revenues	$	859		$	1,373		$	1,149		$	1,247
Loss from operations		(4,567	)		(5,495	)		(6,301	)		(5,543	)
Net loss		(4,547	)		(5,430	)		(6,238	)		(5,483	)
Basic and diluted net loss per common share	$	(7.10	)	$	(0.46	)	$	(0.47	)	$	(0.41	)

	2015 Quarter Ended
	March 31,			June 30,			September30,			December31,
Grant revenues	$	—		$	3,427		$	1,073		$	1,585
Loss from operations		(2,469	)		(1,432	)		(3,417	)		(3,997	)
Net loss		(2,468	)		(1,427	)		(3,413	)		(3,987	)
Basic and diluted net loss per common share	$	(4.71	)	$	(2.44	)	$	(5.57	)	$	(6.36	)