Note 1 - General and Basis of Presentation - Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Contract assets (*)	[1]	$ 19,477	$ 38,365
Contract liabilities (*)	[1]	$ (5,599)	$ (2,755)

[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 sheets. The contract liabilities balance at the beginning of the year was fully recognized as product revenues during the six months ended June 30, 2020 as a result of performance obligations satisfied.