Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-lived intangible assets:
Gross Carrying Amount	$ 2,598	$ 2,598
Accumulated Amortization	1,860	1,715
Net Carrying Amount	738	883
Indefinite-lived intangible assets:
Gross Carrying Amount	3,108	3,108
Accumulated Amortization	1,860	1,715
Net Carrying Amount	1,248	1,393
Trademarks [Member]
Indefinite-lived intangible assets:
Gross Carrying Amount	510	510
Net Carrying Amount	510	510
Customer Relationships [Member]
Finite-lived intangible assets:
Gross Carrying Amount	1,480	1,480
Accumulated Amortization	1,073	979
Net Carrying Amount	407	501
Indefinite-lived intangible assets:
Accumulated Amortization	1,073	979
Patented Technology [Member]
Finite-lived intangible assets:
Gross Carrying Amount	590	590
Accumulated Amortization	366	346
Net Carrying Amount	224	244
Indefinite-lived intangible assets:
Accumulated Amortization	366	346
Computer Software, Intangible Asset [Member]
Finite-lived intangible assets:
Gross Carrying Amount	270	270
Accumulated Amortization	182	169
Net Carrying Amount	88	101
Indefinite-lived intangible assets:
Accumulated Amortization	182	169
Trade Names [Member]
Finite-lived intangible assets:
Gross Carrying Amount	140	140
Accumulated Amortization	121	103
Net Carrying Amount	19	37
Indefinite-lived intangible assets:
Accumulated Amortization	121	103
Order or Production Backlog [Member]
Finite-lived intangible assets:
Gross Carrying Amount	70	70
Accumulated Amortization	70	70
Indefinite-lived intangible assets:
Accumulated Amortization	70	70
Noncompete Agreements [Member]
Finite-lived intangible assets:
Gross Carrying Amount	48	48
Accumulated Amortization	48	48
Indefinite-lived intangible assets:
Accumulated Amortization	$ 48	$ 48