Note 13 - Supplemental Cash Flow Information - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest paid	$ 3,479	$ 20
Federal, state, and local income taxes paid, net	0	4
Change in contract receivables, net	794	2,999
Change in contract liabilities, net	(794)	(2,655)
Property, plant, and equipment purchases in accounts payable	$ 1,962	$ 1,668