Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2012

Components Of Accrued Expenses

Accrued expenses consisted of the following as of the dates presented:

	December 31,
	2012		2011
Clinical and preclinical trials	$	25,150	$	21,453
Payroll and payroll-related		13,439		1,112
Interest payable		1,698		—
Accrued professional services and other liabilities		8,664		1,719
Total	$	48,951	$	24,284