Note 2 - Assets Held for Sale and Discontinued Operations - Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Loss recognized on classification as held for sale	$ 0	$ (925)
Total assets of discontinued operations	0	159
Total liabilities of discontinued operations	0	953
Net loss from discontinued operations	(1,401)	(1,506)
Sale of assets held for sale	1,052	5,437
Discontinued Operations, Held-for-Sale [Member]
Accounts receivable, net	0	177
Inventories, net	0	2
Prepaid expenses and other current assets	0	167
Seismic equipment lease pool and property and equipment, net	0	738
Total assets of discontinued operations	0	159
Accounts payable	0	132
Deferred revenue	0	73
Accrued expenses and other current liabilities	0	507
Income taxes payable	0	241
Total liabilities of discontinued operations	0	953
Revenue from discontinued operations	0	878
Cost of discontinued operations	91	993
Selling, general and administrative	765	1,622
(Recovery) provision for doubtful accounts	0	(450)
Depreciation and amortization	0	5
Total operating expenses	765	1,177
Operating loss	(856)	(1,292)
Other (expense) income	(545)	93
Loss before income taxes from discontinued operations	(1,401)	(1,199)
Provision for income taxes from discontinued operations	0	(307)
Net loss from discontinued operations	(1,401)	(1,506)
Depreciation and amortization	0	5
Sale of assets held for sale	$ 1,052	$ 6,198