Note 3 - Costs and Estimated Earnings on Uncompleted Contracts: Schedule of Costs and Estimated Earnings on Uncompleted Contracts (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Details
Total accumulated costs and estimated earnings on uncompleted contracts	$ 31,548	$ 31,634
Less total billings on uncompleted contracts	(33,359)	(35,096)
Accumulated costs and estimated earnings on uncompleted contracts, net	(1,811)	(3,462)
Costs in Excess of Billings	2,763	3,038
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (4,574)	$ (6,500)