Note 4 - Cost of Construction and Constructed Assets - Constructed Assets, Net and Cost of Construction (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Asset under Construction [Member]
Property, Plant and Equipment, Gross	$ 15,079	$ 15,079
Accumulated depreciation	(714)	(579)
Property, Plant and Equipment, Net, Total	14,365	14,500
Construction in Progress [Member]
Property, Plant and Equipment, Net, Total	$ 39,435	$ 25,034

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, 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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