Accounts Payable, Accrued Expenses and Other Current Liabilities

3 Months Ended

Mar. 31, 2014

Accounts Payable, Accrued Expenses and Other Current Liabilities

NOTE 6 — ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

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


	March 31, 2014		December 31, 2013
Clinical and preclinical studies	$	39,807	$	34,182
Royalties and milestones payable		8,188		6,377
Accounts payable		9,388		3,290
Payroll and payroll-related		8,924		23,832
Accrued professional services and other current liabilities		8,451		9,379
Interest payable		3,396		1,698

Total	$	78,154	$	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, milestones, and upfront payments that are 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; and invoices received from third party vendors.