Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2022

Notes Tables

Property, Plant and Equipment, Useful Life [Table Text Block]

	Years
Land improvements		10	-	20
Buildings and improvements			30
Machinery & equipment		10	-	15
Office furniture		3	-	5
Vehicles		3	-	7
Computer software		3	-	5