Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,598	$ 2,598
Accumulated Amortization	1,453	1,360
Net Carrying Amount	1,145	1,238
Gross Carrying Amount	3,108	3,108
Accumulated Amortization	1,453	1,360
Net Carrying Amount	1,655	1,748
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	793	725
Net Carrying Amount	687	755
Accumulated Amortization	793	725
Patented Technology [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	590	590
Accumulated Amortization	317	307
Net Carrying Amount	273	283
Accumulated Amortization	317	307
Computer Software, Intangible Asset [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	270	270
Accumulated Amortization	148	142
Net Carrying Amount	122	128
Accumulated Amortization	148	142
Trade Names [Member]
Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items]
Gross Carrying Amount	140	140
Accumulated Amortization	77	68
Net Carrying Amount	63	72
Accumulated Amortization	77	68
Customer 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