Accrued expenses

6 Months Ended

Jun. 30, 2016

Accrued expenses

Accrued expenses

. Accrued Expenses

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

	As of June 30,		As of December 31,
	2016		2015
	(in thousands)
Research and development costs	$	3,245	$	1,329
Employee compensation costs		1,096		1,338
Professional services		435		350
Patent costs		134		235
Other		139		178
Total	$	5,049	$	3,430