Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Cash flows from operating activities:
Net loss	$ (15,085)	$ (20,306)
Adjustments to reconcile net loss to net cash used in operating activities:
PPP loan forgiveness	(850)	(757)
Depreciation and amortization	2,214	4,627
Stock-based compensation	643	708
Impairment of intangible assets	0	2,531
Loss on disposal of discontinued operations	0	1,859
(Recovery) provision for doubtful accounts, net of charge offs	(453)	1,129
Provision for inventory obsolescence	921	321
Deferred tax expense	(106)	32
Changes in:
Accounts receivable	(3,195)	4,632
Unbilled revenue	(57)	72
Inventories	(3,074)	1,178
Income taxes receivable and payable	37	767
Accounts payable, accrued expenses and other current liabilities	713	(2,510)
Prepaid expenses and other current and long-term assets	(565)	581
Deferred revenue	1,878	459
Net cash used in operating activities	(17,134)	(6,360)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	0	(110)
Purchase of technology	0	(366)
Purchases of property and equipment	(834)	(90)
Sale of used lease pool equipment	0	2,010
Sale of assets held for sale	5,437	1,506
Sale of business, net of cash sold	761	257
Net cash provided by investing activities	5,364	3,207
Cash flows from financing activities:
Net proceeds from preferred stock offering	14,676	1,000
Net proceeds from common stock offering	43	3,584
Repurchase of common stock	(2)	0
Preferred stock dividends	(2,530)	(1,677)
Proceeds from PPP loans	0	1,607
Net cash provided by financing activities	12,187	4,514
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	86	16
Net increase in cash, cash equivalents and restricted cash	503	1,377
Cash, cash equivalents and restricted cash, beginning of period	4,611	3,234
Cash, cash equivalents and restricted cash, end of period	5,114	4,611
Lease Pool Equipment [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Gross profit from sale of equipment	0	(1,326)
Other Machinery and Equipment [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Gross profit from sale of equipment	$ (155)	$ (357)