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Note 4 - Cost and Estimated Earnings on Uncompleted Contracts - Cost and Estimated Earnings on Uncompleted Contracts Included in Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Costs and estimated earnings in excess of billings on uncompleted contracts $ 40,945 $ 52,198
Billings in excess of costs and estimated earnings on uncompleted contracts (20,241) (31,630)
Total $ 20,704 $ 20,568