Note 3 - Assets Held for Sale and Discontinued Operations - Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Loss recognized on classification as held for sale	$ (3,341)		$ (3,341)		$ (2,327)
Total assets of discontinued operations	588		588		4,321
Total liabilities of discontinued operations	861		861		963
Loss on disposal (including $2,745 of cumulative translation loss)			(0)	$ (1,859)
Net income loss	(499)	$ (1,220)	(703)	(6,143)
Loss on disposal of discontinued operations			0	1,859
Sale of used lease pool equipment			0	2,010
Sale of assets held for sale			3,187	734
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	1,091		1,091		1,668
Inventories, net	102		102		352
Prepaid expenses and other current assets	134		134		150
Seismic equipment lease pool and property and equipment, net	2,602		2,602		4,478
Total assets of discontinued operations	588		588		4,321
Accounts payable	95		95		59
Deferred revenue	73		73		73
Accrued expenses and other current liabilities	693		693		831
Total liabilities of discontinued operations	861		861		$ 963
Revenue from discontinued operations	53	313	840	5,731
Cost of discontinued operations	86	263	791	4,389
Selling, general and administrative	502	1,146	1,222	4,322
(Recovery) provision for doubtful accounts	(5)	0	(450)	470
Depreciation and amortization	1	43	4	128
Total operating expenses	498	1,189	776	4,920
Operating loss	(531)	(1,139)	(727)	(3,578)
Other income (expenses)	41	(75)	37	0
Loss on disposal (including $2,745 of cumulative translation loss)	0	0	0	(1,859)
Loss before income taxes	(490)
Provision for income taxes	(9)	(6)	(13)	(706)
Net income loss	(499)	(1,220)	(703)	(6,143)
Depreciation and amortization			0	1,771
Loss on disposal of discontinued operations	$ 0	$ 0	0	1,859
Sale of used lease pool equipment			0	2,010
Sale of assets held for sale			3,948	734
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)