Note 10 - Discontinued Operations (Details) - Operating Results for Discontinued Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Closure charges of welding business					$ 100
Interest expense	0	0	0	(25)
Other expenses			(74)	207
Bayou Welding Works [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	0	744	0	8,864
Gross profit	0	(837)	(67)	(4,077)
Operating expenses	215	210	617	1,828
Closure charges of welding business	0	0	0	5,019
Operating loss	(215)	(1,047)	(684)	(10,924)
Other expenses	(1)	0
Loss before tax benefits	(216)	(1,047)	(758)	(10,742)
Tax benefits	86	489	(132)	(4,286)
Net loss	$ (130)	$ (558)	$ (626)	$ (6,456)