Note 9 - Discontinued Operations (Details) - Balance Sheet Data for Discontinued Operations (USD $) In Thousands, unless otherwise specified	Sep. 30, 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	$ 93,443	$ 67,740
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restricted cash	1,193	1,192
Receivables, net	9,552	4,380
Costs and estimated earnings in excess of billings	1,543	2,775
Inventories	0	386
Prepaid expenses and other current assets	77	253
Property, plant and equipment, less accumulated depreciation	1,242	2,803
Other assets	0	4,021
Total assets	13,607	15,810
Accounts payable	1,644	3,225
Accrued expenses	757	1,660
Total liabilities	$ 2,401	$ 4,885