Note 5 - Cost and Estimated Earnings on Uncompleted Contracts (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	December 31,
	2016			2015
	(Dollars in thousands)
Costs and estimated earnings incurred on uncompleted contracts	$	402,357		$	279,176
Less billings to date		(381,789	)		(287,948	)
Total	$	20,568		$	(8,772	)

Cost And Estimated Earnings On Uncompleted Contracts Included In Consolidated Balance Sheets [Table Text Block]

	December 31,
	2016			2015
	(Dollars in thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts	$	52,198		$	25,120
Billings in excess of costs and estimated earnings on uncompleted contracts		(31,630	)		(33,892	)
Total	$	20,568		$	(8,772	)