Note B - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Useful lives
Buildings		20 - 42 years
Land improvements		10 years
Machinery and equipment		2 - 20 years
Furniture and fixtures		3 - 7 years
Computer equipment and software		3 - 10 years
Leasehold improvements		The shorter of the life of the applicable lease or the useful life of the improvement
Transportation equipment		5 years