Note 5 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Employee related expenses	$ 3,583	$ 3,348
Royalties	1,233	2,458
Professional services	194	323
Inventory	94	88
Rent	57	196
Other accrued liabilities	682	657
Total accrued liabilities	$ 5,843	$ 7,070