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Note 6 - AMP Credits (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
Note 6 - AMP Credits (Details Textual) $ in Thousands	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Increase (Decrease) in AMP Credit Receivable			$ 1,543	$ (4,152)
Heavy Fabrications [Member]
Increase (Decrease) in AMP Credit Receivable	$ 4,392	$ 3,132	$ 10,296	$ 6,852
AMP Credit, Credit Per Watt of Wind Power Produced	0.03		0.03
AMP Credit, Discount on the Sale Of AMP Credits, Percentage	6.50%	6.50%	6.50%	6.50%
AMP Credit, Discount on the Sale of AMP Credits, Amount	$ 669	$ 445	$ 669	$ 445
AMP Credit, Miscellaneous Administrative Cost Incurred	77	64	77	64
AMP Credit, Miscellaneous Costs Incurred, Uncapitalized	$ 9	$ 42	$ 9	$ 42