Note 6 - Contracts in Progress (Detail) - Summary of Costs and Estimated Earnings on Contracts in Progress (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Costs incurred on uncompleted contracts	$ 3,922	$ 3,193
Estimated earnings	1,064	855
Total revenues	4,986	4,048
Less: billings to date	5,162	4,031
Total	(176)	17
Balance sheet classification:
Costs in excess of billings on uncompleted contracts	45	171
Billings in excess of costs on uncompleted contracts	(221)	(154)
Total	$ (176)	$ 17