Note 7 - Receivables, Net - Schedule of Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Gross receivables	$ 465,666	$ 439,214
Less: allowance for credit losses	1,078	1,656
Total net receivables	464,588	437,558
Completed and in Progress [Member]
Billed	236,053	220,621
Unbilled	126,371	120,144
Gross receivables	362,424	340,765
Material Sales [Member]
Gross receivables	43,746	47,067
Other Business Products and Services [Member]
Gross receivables	$ 59,496	$ 51,382

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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