Note 9 - Receivables, Net - Schedule of Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Gross receivables	$ 381,307	$ 465,666	$ 394,567
Less: allowance for credit losses	805	1,078	1,284
Total net receivables	380,502	464,588	393,283
Completed and in Progress [Member]
Billed	158,762	236,053	137,174
Unbilled	111,058	126,371	111,654
Gross receivables	269,820	362,424	248,828
Material Sales [Member]
Gross receivables	45,967	43,746	35,252
Other Business Products and Services [Member]
Gross receivables	$ 65,520	$ 59,496	$ 110,487

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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