Accounts Payable, Accrued Expenses and Other Current Liabilities

12 Months Ended

Dec. 31, 2014

Payables and Accruals [Abstract]

Accounts Payable, Accrued Expenses and Other Current Liabilities

NOTE 9. 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

Accounts payable represents short-term liabilities for which the Company has received and processed a vendor invoice prior to the end of the reporting period. Accrued expenses and other current liabilities represent, among other things, compensation and related benefits to employees, royalties due to licensors of technologies; cash interest payable related to the Company’s Convertible Notes, estimated amounts due to third party vendors for services rendered prior to the end of the reporting period, invoices received from third party vendors that have not yet been processed, taxes payable, and other accrued items.