Note 11 - Discontinued Operations (Details) - Balance Sheet Data for Discontinued Operations (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Costs and estimated earnings in excess of billings	$ 55,021	$ 36,188
Bayou Welding Works [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restricted cash	1,193	1,192
Receivables, net	4,038	4,380
Costs and estimated earnings in excess of billings	4	2,775
Inventories	0	386
Prepaid expenses and other current assets	200	253
Property, plant and equipment, less accumulated depreciation	1,118	2,803
Other assets	1,803	4,021
Total assets	8,356	15,810
Accounts payable	2,050	3,225
Accrued expenses	20	1,660
Deferred tax liability	197	0
Total liabilities	$ 2,267	$ 4,885