ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ACCRUED EXPENSES
Accrued Royalty and License Fees	$ 250	$ 1,776
Accrued Payroll and Employee Benefits	3,515	925
Accrued Research and Development Contract Costs	11,840	7,569
Accrued Professional Fees	556	317
Other Accrued Expenses	1,018	373
Accrued Expenses	$ 17,179	$ 10,960