Note 3 - Property, Plant and Equipment - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Land	$ 7,345	$ 7,344
Plant and buildings	140,951	99,172
Furniture and fixtures	2,028	1,831
Machinery and equipment	14,983	15,209
Construction in progress	59,919	88,934
Property held for development	15,437	15,437
Total gross property, plant & equipment	243,552	230,972
Less accumulated depreciation	(55,476)	(50,531)
Total net property, plant & equipment	188,076	180,441
Property, Plant and Equipment [Member]
Finance lease right of use assets	$ 2,889	$ 3,045

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount, after accumulated amortization, of right-of-use asset from finance lease.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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For banks, the total amount of real estate assets held for development and sale.

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