Note 7 - AMP Credits (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 21, 2023 USD ($)
Increase (Decrease) in AMP Credit Receivable	$ 7,051	$ (0)
Heavy Fabrications [Member]
Increase (Decrease) in AMP Credit Receivable	$ 14,493
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%
AMP Credit, Discount on the Sale of AMP Credits, Amount			$ 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			254
AMP Credit, Miscellaneous Costs Incurred, Uncapitalized			$ 197