Note 5 - Property, Plant and Equipment (Tables)

12 Months Ended

Mar. 31, 2022

Notes Tables

Property, Plant and Equipment [Table Text Block]

	As of:
	March 31,			March 31,
	2022			2021
Land and land improvements	$	42,981		$	42,647
Buildings and improvements		202,444		$	188,333
Machinery & equipment		403,192			371,925
Office furniture, vehicles and computer software		10,003			9,404
Construction in progress		29,976			32,580
Property, plant and equipment, cost		688,596			644,889
Less: accumulated depreciation		(420,553	)		(396,306	)
Property, plant and equipment, net	$	268,043		$	248,583