Note 1 - General and Basis of Presentation - Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Contract assets (*)	[1]	$ 29,762	$ 42,130
Contract liabilities (*)	[1]	(15,508)	(18,402)
Contract assets, net		$ 14,254	$ 23,728

[1] Contract assets and contract liabilities are presented as "Costs and estimated earnings in excess of billings on uncompleted contracts" and "Billings in excess of costs and estimated earnings on uncompleted contracts", respectively, on the consolidated balance sheet.