Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,598	$ 2,598
Accumulated Amortization	1,788	1,715
Net Carrying Amount	810us-gaap_FiniteLivedIntangibleAssetsNet	883us-gaap_FiniteLivedIntangibleAssetsNet
Gross Carrying Amount	3,108	3,108
Accumulated Amortization	1,788	1,715
Net Carrying Amount	1,320	1,393
Trademarks [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	510	510
Net Carrying Amount	510	510
Customer Relationships [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	1,480	1,480
Accumulated Amortization	1,026	979
Net Carrying Amount	454	501
Accumulated Amortization	1,026	979
Patented Technology [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	590	590
Accumulated Amortization	356	346
Net Carrying Amount	234	244
Accumulated Amortization	356	346
Computer Software, Intangible Asset [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	270	270
Accumulated Amortization	176	169
Net Carrying Amount	94	101
Accumulated Amortization	176	169
Trade Names [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	140	140
Accumulated Amortization	112	103
Net Carrying Amount	28	37
Accumulated Amortization	112	103
Order or Production Backlog [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	70	70
Accumulated Amortization	70	70
Accumulated Amortization	70	70
Noncompete Agreements [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	48	48
Accumulated Amortization	48	48
Accumulated Amortization	$ 48	$ 48

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB

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-Topic 350

-SubTopic 30

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