Note 9 - Discontinued Operations (Details) - Operating Results for Discontinued Operations (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 Bayou Welding Works [Member]	Jun. 30, 2013 Bayou Welding Works [Member]	Jun. 30, 2014 Bayou Welding Works [Member]	Jun. 30, 2013 Bayou Welding Works [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues				$ 0	$ 2,444	$ 0	$ 8,120
Gross profit				(46)	(2,161)	(67)	(3,240)
Operating expenses				200	1,159	402	1,618
Closure charges of welding business			100	0	5,019	0	5,019
Operating loss				(246)	(8,339)	(469)	(9,877)
Other expenses	(73)	182		(73)	211
Loss before tax benefits				(319)	(8,128)	(542)	(9,695)
Tax benefits				(45)	3,151	(46)	(3,797)
Net loss				$ (364)	$ (4,977)	$ (496)	$ (5,898)