Note 2 - Significant Accounting Policies - Long-Lived Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Jan. 31, 2023
Property, plant and equipment	$ 87,493	$ 82,930
Less accumulated depreciation	49,873	56,412
Property, plant and equipment, net of accumulated depreciation	37,619	26,518
Land, Buildings and Improvements [Member]
Property, plant and equipment	$ 25,620	22,276
Land, Buildings and Improvements [Member] | Minimum [Member]
Useful life (Year)	3 years
Land, Buildings and Improvements [Member] | Maximum [Member]
Useful life (Year)	30 years
Machinery and Equipment [Member]
Property, plant and equipment	$ 56,411	54,200
Machinery and Equipment [Member] | Minimum [Member]
Useful life (Year)	3 years
Machinery and Equipment [Member] | Maximum [Member]
Useful life (Year)	10 years
Furniture and Fixtures [Member]
Property, plant and equipment	$ 3,169	3,727
Furniture and Fixtures [Member] | Minimum [Member]
Useful life (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Useful life (Year)	7 years
Air Transportation Equipment [Member]
Useful life (Year)	3 years
Property, plant and equipment	$ 2,293	$ 2,727