Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities [Abstract]
Compensation	$ 378	$ 2,131
Professional fees	270	466
Accrued Alferon production costs	51	70
Other expenses	529	615
Due for returned product	0	113
Total Accrued Expenses	$ 1,228	$ 3,395