Accrued expenses (Tables)

12 Months Ended

Dec. 31, 2015

Accrued expenses

Schedule of accrued expenses

Accrued expenses consist of the following:

	As of December 31,
	2015		2014
	(in thousands)
Patent costs	$	235	$	274
Research and development costs		1,329		125
Professional services		350		81
Employee compensation costs		1,338		85
Other		178		77
Total	$	3,430	$	642