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Note 5 - Costs and Estimated Earnings and Billings on Uncompleted Contracts (Detail) - Net amount of costs and estimated earning on uncompleted contracts above (below) billings: (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 20,592	$ 16,509
Billings in excess of costs and estimated earnings on uncompleted contracts	(18,918)	(18,583)
Net amount of costs and estimated earnings on uncompleted contracts above (below) billings	$ 1,674	$ (2,074)