Note 7 - Contracts in Progress (Details) - Summary of Costs and Estimated Earnings on Contracts in Progress (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Summary of Costs and Estimated Earnings on Contracts in Progress [Abstract]
Costs incurred on uncompleted contracts	$ 7,733	$ 7,347
Estimated earnings	1,772	1,603
Total revenues	9,505	8,950
Less: billings to date	9,398	9,569
Total	107	(619)
Balance sheet classification:
Costs and estimated earnings in excess of billings on uncompleted contracts	129	145
Billings in excess of costs and estimated earnings on uncompleted contracts	(22)	(764)
Total	$ 107	$ (619)