Note 2 - Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Property, Plant and Equipment Estimated Useful Lives [Table Text Block]

Land improvement	-	12 years
Buildings	-	Up to 40 years
Leased property, including leasehold buildings	-	over the lesser of the remaining useful life or period of the lease
Plant and equipment	-	2 to 12 years