Note 4 - Cost and Estimated Earnings on Uncompleted Contracts (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Cost And Estimated Earnings On Uncompleted Contracts [Table Text Block]

	December 31,
	2017			2016
	(Dollars in thousands)
Costs and estimated earnings incurred on uncompleted contracts	$	550,823		$	402,357
Less billings to date		(530,119	)		(381,789	)
Total	$	20,704		$	20,568

Cost and Estimated Earnings on Uncompleted Contracts Included in Consolidated Balance Sheets [Table Text Block]

	December 31,
	2017			2016
	(Dollars in thousands)
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