Note 7 - Acquired Intangible Assets, Net - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gross value	$ 118,859	$ 28,206
Accumulated Currency Translation Adjustment	(4,227)	(4,759)
Current period impairment charge	(2,439)	(389)	$ 0
Accumulated Amortization	(21,036)	(15,473)
Net book value	$ 91,157	$ 7,585
Useful life (Year)	13 years	11 years
Developed Technology Rights [Member]
Gross value	$ 93,953	$ 17,100
Accumulated Currency Translation Adjustment	(2,648)	(2,934)
Current period impairment charge	(1,025)	(389)
Accumulated Amortization	(14,381)	(9,657)
Net book value	$ 75,899	$ 4,120
Useful life (Year)	15 years	15 years
In Process Research and Development [Member]
Gross value	$ 5,006	$ 4,406
Accumulated Currency Translation Adjustment	(1,005)	(1,234)
Current period impairment charge	(1,414)	0
Accumulated Amortization	0	0
Net book value	2,587	3,172
Customer Relationships [Member]
Gross value	9,000
Accumulated Currency Translation Adjustment	0
Current period impairment charge	0
Accumulated Amortization	(827)
Net book value	$ 8,173
Useful life (Year)	10 years
Distribution Rights [Member]
Gross value	$ 4,700	4,700
Accumulated Currency Translation Adjustment	(415)	(415)
Current period impairment charge	0	0
Accumulated Amortization	(4,285)	(4,285)
Net book value	$ 0	$ 0
Useful life (Year)	5 years	5 years
Patents [Member]
Gross value	$ 1,000	$ 1,000
Accumulated Currency Translation Adjustment	(159)	(176)
Current period impairment charge	0	0
Accumulated Amortization	(582)	(531)
Net book value	$ 259	$ 293
Useful life (Year)	16 years	16 years
Trade Names [Member]
Gross value	$ 5,200	$ 1,000
Accumulated Currency Translation Adjustment	0	0
Current period impairment charge	0	0
Accumulated Amortization	(961)	(1,000)
Net book value	$ 4,239	$ 0
Useful life (Year)	5 years	9 years