Leases Balance Sheet Lease Information (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Lessee, Lease, Description [Line Items]
Operating Lease right-of-use asset	$ 6,850	$ 4,275
Property, plant and equipment, gross	258,302	242,682
Accumulated Depreciation	(152,295)	(141,832)
Property, plant and equipment, net	106,007	100,850
Finance Lease, Liability, Total	750	515
Accrued Liabilities
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Current	2,120	2,272
Finance Lease, Liability, Current	362	258
Other Noncurrent Liabilities
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Noncurrent	5,038	2,370
Finance Lease, Liability, Noncurrent	388	257
Current and Long-term Liabilities
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Total	7,158	4,642
Right of Use Asset, Financing Lease
Lessee, Lease, Description [Line Items]
Property, plant and equipment, gross	1,282	881
Accumulated Depreciation	(532)	(366)
Property, plant and equipment, net	$ 750	$ 515