Accounts Payable and Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accounts payable	$ 128	$ 642
Payroll and other employee benefits	1,039	1,815
Accrued vacation	813	703
Accrued legal expenses - patent	5,900	3,990
Accrued consulting and other professional fees	2,948	1,510
Accrued distribution to noncontrolling interest	504	504
Other accrued liabilities	223	71
Accounts payable and accrued expenses	$ 11,555	$ 9,235