Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2013

Component of Accrued Expenses

Accrued expenses consist of the following:

	December 31,
(in thousands)	2013		2012
Professional services	$	582	$	835
Clinical consulting services		3,751		9,628
Preclinical services		513		411
Manufacturing services		547		3,217
Accrued vacation		227		452
Other consulting services		230		903
Payroll taxes and benefits		255		585
Severance		—		474
Employee compensation		252		11
Accrued expenses	$	6,357	$	16,516