Note 2 - Assets Held for Sale and Discontinued Operations - Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Loss recognized on classification as held for sale	$ (925)	$ (2,327)
Total assets of discontinued operations	159	4,321
Total liabilities of discontinued operations	953	1,442
Loss on disposal (including $2,745 of cumulative translation loss)	(0)	(1,859)
Net loss from discontinued operations	(1,506)	(6,304)
Loss on disposal of discontinued operations	0	1,859
Sale of used lease pool equipment	0	2,010
Sale of assets held for sale	5,437	1,506
Purchases of seismic equipment held for lease	0	(110)
Lease Pool Equipment [Member]
Gross profit from sale of lease pool equipment	(0)	1,326
Discontinued Operations, Held-for-sale [Member]
Accounts receivable, net	177	1,668
Inventories, net	2	352
Prepaid expenses and other current assets	167	150
Seismic equipment lease pool and property and equipment, net	738	4,478
Total assets of discontinued operations	159	4,321
Accounts payable	132	59
Deferred revenue	73	73
Accrued expenses and other current liabilities	507	831
Income taxes payable	241	479
Total liabilities of discontinued operations	953	1,442
Revenue from discontinued operations	878	5,747
Cost of discontinued operations	993	4,537
Selling, general and administrative	1,622	4,589
(Recovery) provision for doubtful accounts	(450)	470
Depreciation and amortization	5	132
Total operating expenses	1,177	5,191
Operating loss	(1,292)	(3,981)
Other income	93	201
Loss on disposal (including $2,745 of cumulative translation loss)	0	(1,859)
Loss before income taxes from discontinued operations	(1,199)	(5,639)
Provision for income taxes from discontinued operations	(307)	(665)
Net loss from discontinued operations	(1,506)	(6,304)
Depreciation and amortization	5	1,830
Loss on disposal of discontinued operations	0	1,859
Sale of used lease pool equipment	0	2,010
Sale of assets held for sale	6,198	1,506
Purchases of seismic equipment held for lease	0	(110)
Discontinued Operations, Held-for-sale [Member] | Lease Pool Equipment [Member]
Gross profit from sale of lease pool equipment	$ 0	$ (1,326)