Inventories (Tables)

9 Months Ended

Oct. 31, 2021

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or net realizable value and consisted of the following:

(in thousands)	October 31, 2021		January 31, 2021
Raw materials	$	4,357	$	2,936
Work in progress	72,551		59,523
Finished goods	28,251		25,035
Inventories	$	105,159	$	87,494