Note 5 - Goodwill and Acquisition-Related Intangible Assets, Net (Details) - Acquisition-Related Intangible Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Subject to amortization:
Subject to Amortization, Accumulated Amortization	$ (1,406)	$ (672)
Subject to Amortization, Net Amount	4,033
Not subject to amortization:
Gross Amount	7,484	7,484
Accumulated Amortization	(1,406)	(672)
Net Amount	6,078	6,812
IPR&D [Member]
Not subject to amortization:
Not Subject to Amortization, Gross Amount	2,045	2,045
Not Subject to Amortization, Net Amount	2,045	2,045
Know-How [Member]
Subject to amortization:
Subject to Amortization, Gross Amount	1,018	1,018
Subject to Amortization, Accumulated Amortization	(195)	(93)
Subject to Amortization, Net Amount	823	925
Not subject to amortization:
Accumulated Amortization	(195)	(93)
Developed Technology Rights [Member]
Subject to amortization:
Subject to Amortization, Gross Amount	4,421	4,421
Subject to Amortization, Accumulated Amortization	(1,211)	(579)
Subject to Amortization, Net Amount	3,210	3,842
Not subject to amortization:
Accumulated Amortization	$ (1,211)	$ (579)