Note 9 - Discontinued Operations (Details) - Balance Sheet Data for Discontinued Operations (Bayou Welding Works [Member], Discontinued Operations [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Bayou Welding Works [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restricted cash	$ 1,193	$ 1,193
Receivables, net	3,492	4,038
Prepaid expenses and other current assets	252	204
Property, plant and equipment, less accumulated depreciation	1,118	1,118
Deferred tax assets	1,779	1,803
Total assets	7,834	8,356
Accounts payable	1,555	2,050
Accrued expenses	176	20
Deferred tax liabilities	214	197
Total liabilities	$ 1,945	$ 2,267