Note 4 - Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Patents [Member]
Finite-Lived Intangible Assets, Gross	$ 1,844	$ 1,719
Accumulated amortization	(439)	(416)
Net	1,405	1,303
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets, Gross	3,321	3,676
Accumulated amortization	(751)	(644)
Net	2,570	3,032
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Gross	6,121	6,843
Accumulated amortization	(2,551)	(2,091)
Net	3,570	4,752
Customer Relationships [Member]
Finite-Lived Intangible Assets, Gross	716	800
Accumulated amortization	(298)	(245)
Net	418	555
Internally Developed Software [Member]
Finite-Lived Intangible Assets, Gross	1,085	1,085
Accumulated amortization	(154)	(46)
Net	931	1,039
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	214	255
Accumulated amortization	(122)	(105)
Net	92	150
Finite-Lived Intangible Assets, Gross	13,301	14,378
Accumulated amortization	(4,315)	(3,547)
Net	$ 8,986	$ 10,831