Note 6 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property and equipment, gross	$ 92,356	$ 92,045
Less accumulated depreciation and amortization	(36,198)	(35,415)
Property and equipment, net	56,158	56,630
Land and Land Improvements [Member]
Property and equipment, gross	17,052	17,052
Building and Building Improvements [Member]
Property and equipment, gross	54,297	54,171
Machinery and Equipment [Member]
Property and equipment, gross	9,540	9,490
Office Equipment [Member]
Property and equipment, gross	10,356	10,346
Vehicles [Member]
Property and equipment, gross	922	976
Construction in Progress [Member]
Property and equipment, gross	$ 189	$ 10