Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Data (Unaudited)

Summary of quarterly results of operations

These quarterly results are unaudited, but in the opinion of management, have been prepared on the same basis as our audited financial information and include all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the information set forth herein (in thousands, except per share amounts).

	March 31,		June 30,		September 30,		December 31,
	2018		2018		2018		2018
Total revenue	$	—	$	—	$	—	$	—
Operating expenses	$	7,046	$	5,157	$	3,615	$	3,727
Net loss	$	(6,833)	$	(5,344)	$	(3,792)	$	(3,810)
Basic and diluted net loss per common share	$	(0.20)	$	(0.16)	$	(0.11)	$	(0.11)

	March 31,		June 30,		September 30,		December 31,
	2017		2017		2017		2017
Total revenue	$	—	$	—	$	—	$	—
Operating expenses	$	7,126	$	6,996	$	6,701	$	5,988
Net loss	$	(7,516)	$	(7,446)	$	(7,102)	$	(6,240)
Basic and diluted net loss per common share	$	(0.26)	$	(0.26)	$	(0.22)	$	(0.18)