Quarterly Financial Information (unaudited)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

15. Quarterly Financial Information (unaudited)

This table summarizes the unaudited consolidated financial results of operations for the quarters ended:

	March 31,		June 30,		September 30,		December 31,
2015 Quarter Ended
Revenue	$	—	$	—	$	—	$	—
Operating expenses		2,629		2,596		10,640		4,802
Interest income		6		2		7		89
Net loss		(2,623)		(2,594)		(10,632)		(4,714)
Net loss attributable to common stockholders	$	(3,280)	$	(3,270)	$	(11,652)	$	(4,927)
Net loss per share attributable to common stockholders, basic and diluted	$	(1.61)	$	(1.52)	$	(5.12)	$	(0.28)
2014 Quarter Ended
Revenue	$	—	$	—	$	—	$	—
Operating expenses		1,043		2,226		2,662		2,602
Interest income (expense)		9		(3)		5		5
Net loss		(1,034)		(2,229)		(2,657)		(2,597)
Net loss attributable to common stockholders	$	(1,484)	$	(2,693)	$	(3,136)	$	(3,258)
Net loss per share attributable to common stockholders, basic and diluted	$	(0.95)	$	(1.61)	$	(1.75)	$	(1.76)