Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue
Contract revenue - related party	$ 0	$ 253,000	$ 0	$ 487,000
Total revenue	0	253,000	0	487,000
Expenses
Research and development	20,808,000	12,404,000	38,573,000	25,119,000
General and administrative	6,022,000	3,466,000	11,525,000	7,519,000
Total expenses	26,830,000	15,870,000	50,098,000	32,638,000
Loss from operations	(26,830,000)	(15,617,000)	(50,098,000)	(32,151,000)
Other income, net	101,000	51,000	129,000	104,000
Net loss	$ (26,729,000)	$ (15,566,000)	$ (49,969,000)	$ (32,047,000)
Basic and diluted net loss per share (usd per share)	$ (1.21)	$ (0.90)	$ (2.46)	$ (1.86)
Weighted average common shares outstanding - basic and diluted (in shares)	22,123	17,211	20,277	17,211