Note 1 - General and Basis of Presentation - Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Contract assets (*)	[1]	$ 11,522	$ 9,692
Contract liabilities (*)	[1]	$ (10,964)	$ (9,248)

[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 condensed consolidated balance sheets. The contract liabilities balance at the beginning of the year was not yet fully recognized as product revenues during the three months ended March 31, 2022 as a result of performance obligations having not been fully satisfied yet.