Accrued expenses (Tables)

9 Months Ended

Sep. 30, 2016

Accrued expenses

Schedule of accrued expenses

Accrued expenses as of September 30, 2016 and December 31, 2015 consist of the following:

	As of September 30,		As of December 31,
	2016		2015
	(in thousands)
Research and development costs	$	2,552	$	1,329
Employee compensation costs		1,953		1,338
Professional services		887		350
Other		856		178
Patent costs		56		235
Total	$	6,304	$	3,430