Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities, Current [Abstract]
Payroll and other employee benefits	$ 576	$ 1,481
Accrued vacation	701	806
Accrued legal expenses - patent	10,135	8,410
Accrual for court ordered attorneys fees	0	1,548
Foreign taxes payable	3,960	0
Accrued consulting and other professional fees	1,592	1,530
Other accrued liabilities	383	1,085
Accounts payable and accrued expenses	$ 17,347	$ 14,860