Note 9 - Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Gross Value	$ 28,206
Accumulated Currency Translation Adjustment	(4,445)	$ (4,132)
Accumulated Amortization	(14,197)	(13,439)
Intangible assets, net	9,564	10,635
In Process Research and Development [Member]
Gross Value	4,406
Accumulated Currency Translation Adjustment	(1,122)	(1,015)
Accumulated Amortization
Intangible assets, net	3,284	3,391
Developed Technology Rights [Member]
Gross Value	17,100
Accumulated Currency Translation Adjustment	(2,744)	(2,550)
Accumulated Amortization	(8,443)	(7,723)
Intangible assets, net	$ 5,913	6,827
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	(164)	(152)
Accumulated Amortization	(469)	(431)
Intangible assets, net	$ 367	417
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