Note 8 - Acquired Intangible Assets, Net - Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016
Gross Value		$ 28,206,000
Accumulated Currency Translation Adjustment		(5,497,000)
Accumulated Amortization		(12,482,000)
Intangible assets, net	$ 11,656,000	10,227,000
Developed Technology Rights [Member]
Gross Value		17,100,000
Accumulated Currency Translation Adjustment		(3,442,000)
Accumulated Amortization		(6,816,000)
Intangible assets, net	$ 7,959	6,842,000
Useful Life (Year)	15 years
In Process Research and Development [Member]
Gross Value		4,406,000
Accumulated Currency Translation Adjustment		(1,433,000)
Intangible assets, net	$ 3,099,000	2,973,000
Distribution Rights [Member]
Gross Value		4,700,000
Accumulated Currency Translation Adjustment		(415,000)
Accumulated Amortization		(4,285,000)
Intangible assets, net
Useful Life (Year)	5 years
Patents [Member]
Gross Value		1,000,000
Accumulated Currency Translation Adjustment		(207,000)
Accumulated Amortization		(381,000)
Intangible assets, net	$ 473,000	412,000
Useful Life (Year)	16 years
Elevess Trade Name [Member]
Gross Value		1,000,000
Accumulated Amortization		(1,000,000)
Intangible assets, net	$ 125,000
Useful Life (Year)	9 years