Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2017

Payables and Accruals [Abstract]

Summary of Accrued Expenses

Accrued expenses consist of the following (in thousands):

	March 31, 2017		December 31, 2016
Accrued compensation	$	5,285	$	11,092
Accrued research and development costs		13,474		20,266
Accrued professional fees		5,060		476
Accrued other		1,295		168
Total	$	25,114	$	32,002