Note 5 - AMP Credits (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 21, 2023 USD ($)
Increase (Decrease) in AMP Credit Receivable	$ (5,319)	$ 3,162
Heavy Fabrications [Member]
Increase (Decrease) in AMP Credit Receivable	$ 1,872	$ 3,162
AMP Credit, Credit Per Watt of Wind Power Produced	0.03
AMP Credit, Credits Sold				$ 6,952
AMP Credit, Discount on the Sale Of AMP Credits, Percentage	6.50%			6.50%
AMP Credit, Discount on the Sale of AMP Credits, Amount	$ 122			$ 452
AMP Credit, Write-down of Remaining Credit Receivable				7,541
AMP Credit, Loss on Sale of AMP Credits				490
AMP Credit, Miscellaneous Administrative Cost Incurred	33			$ 254
AMP Credit, Miscellaneous Costs Incurred, Uncapitalized	$ 42		$ 197