Note 9 - Acquired Intangible Assets, Net - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Gross Value	$ 28,206
Accumulated Currency Translation Adjustment	(4,576)	$ (4,132)
Accumulated Amortization	(14,439)	(13,439)
Intangible assets, net	9,191	10,635
In Process Research and Development [Member]
Gross Value	4,406
Accumulated Currency Translation Adjustment	(1,168)	(1,015)
Accumulated Amortization
Intangible assets, net	3,238	3,391
Developed Technology Rights [Member]
Gross Value	17,100
Accumulated Currency Translation Adjustment	(2,824)	(2,550)
Accumulated Amortization	(8,672)	(7,723)
Intangible assets, net	$ 5,604	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)
Useful life (Year)	5 years
Net Book Value, abandonment
Patents [Member]
Gross Value	1,000
Accumulated Currency Translation Adjustment	(169)	(152)
Accumulated Amortization	(482)	(431)
Intangible assets, net	$ 349	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