Note 3 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Customer Relationships [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	$ 1,480	$ 1,480
Finite-lived, Accumulated Amortization	1,166	979
Net Carrying Amount	314	501
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	1,166	979
Patented Technology [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	590	590
Finite-lived, Accumulated Amortization	386	346
Net Carrying Amount	204	244
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	386	346
Computer Software, Intangible Asset [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	270	270
Finite-lived, Accumulated Amortization	196	169
Net Carrying Amount	74	101
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	196	169
Trade Names [Member]
Finite-lived intangible assets:
Finite-lived, Gross Carrying Amount	140	140
Finite-lived, Accumulated Amortization	138	103
Net Carrying Amount	2	37
Indefinite-lived intangible assets:
Finite-lived, Accumulated Amortization	138	103
Trademarks [Member]
Indefinite-lived intangible assets:
Indefinite-lived, Gross Carrying Amount	510	510
Finite-lived, Gross Carrying Amount	2,480	2,480
Finite-lived, Accumulated Amortization	1,886	1,597
Net Carrying Amount	594	883
Intangible Assets, Gross Carrying Amount	2,990	2,990
Finite-lived, Accumulated Amortization	1,886	1,597
Net Carrying Amount	$ 1,104	$ 1,393