Note 7 - Receivables, Net - Schedule of Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	[1]
Gross receivables	$ 465,129				$ 465,666
Less: allowance for credit losses	1,142				1,078
Total net receivables	463,987	$ 618,144	$ 527,277	$ 380,502	464,588
Completed and in Progress [Member]
Billed	220,809				236,053
Unbilled	120,348				126,371
Gross receivables	341,157				362,424
Material Sales [Member]
Gross receivables	52,182				43,746
Other Business Products and Services [Member]
Gross receivables	$ 71,790				$ 59,496

[1] These balances do not include amounts held for sale (see Note 2).