Note 4 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Capitalized Interest Costs, Including Allowance for Funds Used During Construction	$ 1,300	$ 1,100	$ 2,400	$ 2,100
Depreciation	$ 2,500	$ 2,350	$ 5,057	$ 4,708

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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