Note 2 - Discontinued Operations and Held-for-sale - Assets and Liabilities Held-for-sale (Details) - WMS Inliner [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 16,496	$ 10,844
Receivables, net	102,208	103,254
Contract assets	41,340	32,842
Inventories	19,625	19,891
Other current assets	1,781	4,432
Property and equipment, net	70,912	105,867
Investments in affiliates	48,675	47,650
Goodwill	63,063	63,062
Right of use assets	12,365	9,269
Other noncurrent assets	16,176	26,256
Total assets classified as held-for-sale	392,641	423,367
Accounts payable	37,997	37,813
Contract liabilities	7,129	8,396
Other current liabilities	27,764	22,750
Deferred income taxes, net	0	1,133
Long-term lease liabilities	8,352	6,953
Other long-term liabilities	2,166	2,264
Total liabilities classified as held-for-sale	$ 83,408	$ 79,309