Note 3 - Assets Held for Sale and Discontinued Operations - Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Loss recognized on classification as held for sale	$ 0		$ 0		$ (925)
Total assets of discontinued operations	178		178		159
Total liabilities of discontinued operations	202		202		953
Net Income (loss) from discontinued operations	(162)	$ 79	224	$ (204)
Sale of assets held for sale			361	484
Lease Pool Equipment [Member]
Gross profit from sale of assets held-for-sale			358	(0)
Discontinued Operations, Held-for-sale [Member]
Accounts receivable, net	24		24		177
Inventories, net	1		1		2
Prepaid expenses and other current assets	113		113		167
Seismic equipment lease pool and property and equipment, net	40		40		738
Total assets of discontinued operations	178		178		159
Accounts payable	0		0		132
Deferred revenue	56		56		73
Accrued expenses and other current liabilities	122		122		507
Income taxes payable	24		24		241
Total liabilities of discontinued operations	202		202		$ 953
Revenue from discontinued operations	0	757	0	787
Cost of discontinued operations	23	332	48	705
Selling, general and administrative	101	378	214	720
Recovery of doubtful accounts	0	(2)	0	(445)
Depreciation and amortization	0	2	0	3
Total operating expenses	101	378	214	278
Operating (loss) income	(124)	47	(262)	(196)
Other income (expenses)	(38)	35	486	(4)
Income (loss) before income taxes from discontinued operations	(162)	82	224	(200)
Provision for income taxes from discontinued operations	$ 0	$ (3)	0	(4)
Sale of assets held for sale			361	1,245
Discontinued Operations, Held-for-sale [Member] | Lease Pool Equipment [Member]
Gross profit from sale of assets held-for-sale			$ (358)	$ 0