Note 8 - Contracts in Progress (Details) - Summary of Costs and Estimated Earnings on Contracts in Progress (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Summary of Costs and Estimated Earnings on Contracts in Progress [Abstract]
Costs incurred on uncompleted contracts	$ 7,347	$ 7,067
Estimated earnings	1,603	1,330
Total revenues	8,950	8,397
Less: billings to date	9,569	8,762
Total	(619)	(365)
Balance sheet classification:
Costs in excess of billings on uncompleted contracts	145	99
Billings in excess of costs on uncompleted contracts	$ (764)	$ (464)