Basis of Presentation (Accrued Liabilities and Other Long-Term Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accrued Liabilities
Compensation	$ 1,399	$ 1,708
Professional fees	545	459
Amounts owed to former licensees	1,960	925
Royalties owed to third parties	634	705
Other	1,091	1,069
Total accrued liabilities	5,629	4,866
Other Long-Term Liabilities
Deposits	396	411
Deferred rent	306	327
Other	32	32
Total other long-term liabilities	$ 734	$ 770