Accounts Payable, Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Payables and Accruals [Abstract]

Components of Accounts Payable, Accrued Expenses and Other Current Liabilities

Accounts payable, accrued expenses and other current liabilities consisted of the following:

	December 31,
	2014		2013
Payroll and payroll-related	$	33,272	$	23,832
Clinical and preclinical		31,069		34,182
Royalties payable		13,582		6,377
Accounts payable		10,492		3,290
Accrued professional services and other current liabilities		8,913		6,879
Other payable to licensor		5,000		2,500
Taxes payable		2,106		—
Interest payable		1,698		1,698
Total	$	106,132	$	78,758