Note 5 - Goodwill and Acquisition-Related Intangible Assets, Net (Details) - Acquisition-Related Intangible Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Subject to amortization:
Accumulated Amortization	$ (1,039)	$ (672)
Net Amount	4,400
Not subject to amortization:
Gross Amount	7,484	7,484
Accumulated Amortization	(1,039)	(672)
Net Amount	6,445	6,812
IPR&D [Member]
Not subject to amortization:
Gross Amount	2,045	2,045
Net Amount	2,045	2,045
Know-How [Member]
Subject to amortization:
Gross Amount	1,018	1,018
Accumulated Amortization	(144)	(93)
Net Amount	874	925
Not subject to amortization:
Accumulated Amortization	(144)	(93)
Developed Technology Rights [Member]
Subject to amortization:
Gross Amount	4,421	4,421
Accumulated Amortization	(895)	(579)
Net Amount	3,526	3,842
Not subject to amortization:
Accumulated Amortization	$ (895)	$ (579)