Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2016

Payables And Accruals [Abstract]

Schedule of Accrued Liabilities

Accrued expenses consist of the following (in thousands):

	As of December 31,
	2016		2015
Payroll and employee-related costs	$	2,585	$	773
Research costs		996		910
Licensing fees		492		1,055
Professional fees		2,715		2,412
Intellectual property costs		3,372		2,592
Accrued property and equipment		5,081		—
Other		1,079		688
Total	$	16,320	$	8,430