Note 6 - Balance Sheet - Continuing Operations - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Property and equipment, gross	$ 18,848	$ 20,564
Accumulated depreciation and amortization	(14,502)	(15,813)
Total property and equipment, net	4,346	4,751
Marine Services Equipment [Member]
Property and equipment, gross	3,912	5,969
Land and Building [Member]
Property and equipment, gross	4,479	4,354
Furniture and Fixtures [Member]
Property and equipment, gross	9,962	9,750
Vehicles [Member]
Property and equipment, gross	$ 495	$ 491

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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