Note 8 - Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Gross Value	$ 28,206
Accumulated Currency Translation Adjustment	(4,132)	$ (5,497)
Accumulated Amortization	(13,439)	(12,482)
Intangible assets, net	10,635	10,227
In Process Research and Development [Member]
Gross Value	4,406
Accumulated Currency Translation Adjustment	(1,015)	(1,433)
Accumulated Amortization
Intangible assets, net	3,391	2,973
Developed Technology Rights [Member]
Gross Value	17,100
Accumulated Currency Translation Adjustment	(2,550)	(3,442)
Accumulated Amortization	(7,723)	(6,816)
Intangible assets, net	$ 6,827	6,842
Useful Life (Year)	15 years
Distribution Rights [Member]
Gross Value	$ 4,700
Accumulated Currency Translation Adjustment	(415)	(415)
Accumulated Amortization	(4,285)	(4,285)
Intangible assets, net
Useful Life (Year)	5 years
Patents [Member]
Gross Value	$ 1,000
Accumulated Currency Translation Adjustment	(152)	(207)
Accumulated Amortization	(431)	(381)
Intangible assets, net	$ 417	412
Useful Life (Year)	16 years
Elevess Trade Name [Member]
Gross Value	$ 1,000
Accumulated Currency Translation Adjustment
Accumulated Amortization	(1,000)	(1,000)
Intangible assets, net
Useful Life (Year)	9 years