Note 4 - Other Intangible Assets (Details) - Other Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,365	$ 5,318
Accumulated Amortization	(2,664)	(2,338)
Net Carrying Amount	2,701	2,980
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	546	514
Accumulated Amortization	(169)	(155)
Net Carrying Amount	377	359
Patents [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives (Years)	8 years
Patents [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives (Years)	18 years
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives (Years)	3 years
Gross Carrying Amount	394	379
Accumulated Amortization	(305)	(258)
Net Carrying Amount	89	121
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives (Years)	1 year 73 days
Gross Carrying Amount	265	265
Accumulated Amortization	(252)	(174)
Net Carrying Amount	13	91
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives (Years)	6 months
Gross Carrying Amount	790	790
Accumulated Amortization	(790)	(790)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives (Years)	12 years
Gross Carrying Amount	3,370	3,370
Accumulated Amortization	(1,148)	(961)
Net Carrying Amount	$ 2,222	$ 2,409