Note 6 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Property, plant and equipment	$ 79,223	$ 78,674
Accumulated depreciation and amortization	(54,467)	(51,777)
Property, plant and equipment, net of accumulated depreciation	24,756	26,897
Finance lease liability long-term	173	401
Total finance lease liabilities	530	701
Operating Lease, Right-of-Use Asset	11,213	13,384
Operating lease liability short-term	1,496	1,402
Operating lease liability long-term	11,270	13,174
Total operating lease liabilities	12,766	14,576
Other Current Liabilities [Member]
Finance lease liability short-term	357	300
Finance Leases Assets [Member]
Property, plant and equipment	1,221	879
Accumulated depreciation and amortization	(490)	(96)
Property, plant and equipment, net of accumulated depreciation	$ 731	$ 783