Note 7 - Contracts in Progress (Details) - Summary of Costs and Estimated Earnings on Contracts in Progress (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Summary of Costs and Estimated Earnings on Contracts in Progress [Abstract]
Costs incurred on uncompleted contracts	$ 7,586	$ 7,347
Estimated earnings	1,726	1,603
Total revenues	9,312	8,950
Less: billings to date	9,358	9,569
Total	(46)	(619)
Balance sheet classification:
Costs and estimated earnings in excess of billings on uncompleted contracts		145
Billings in excess of costs and estimated earnings on uncompleted contracts	(46)	(764)
Total	$ (46)	$ (619)