Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash flows from operating activities:
Net loss	$ (9,222)	$ (16,836)
Adjustments to reconcile net loss to net cash used in operating activities:
PPP loan forgiveness	(850)	0
Depreciation and amortization	1,721	3,920
Stock-based compensation	419	562
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)	470
Provision for inventory obsolescence	388	256
Deferred tax expense	0	(32)
Changes in:
Accounts receivable	(4,444)	3,640
Unbilled revenue	(27)	(6)
Inventories	(183)	762
Prepaid expenses and other current and long-term assets	(293)	1,065
Income taxes receivable and payable	3	390
Accounts payable, accrued expenses and other current liabilities	1,696	(1,827)
Deferred revenue	172	72
Net cash used in operating activities	(11,228)	(4,803)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	0	(110)
Purchases of property and equipment	(139)	(64)
Sale of used lease pool equipment	0	2,010
Sale of assets held for sale	3,187	734
Sale of a business	761	0
Net cash provided by investing activities	3,809	2,570
Cash flows from financing activities:
Purchase of treasury stock	(2)	0
Net proceeds from preferred stock offering	5,145	0
Net proceeds from common stock offering	43	1,291
Preferred stock dividends	(1,842)	(1,118)
Proceeds from PPP loans	0	1,607
Net cash provided by financing activities	3,344	1,780
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	86	(117)
Net decrease in cash, cash equivalents and restricted cash	(3,989)	(570)
Cash, cash equivalents and restricted cash, beginning of period	4,611	3,234
Cash, cash equivalents and restricted cash, end of period	622	2,664
Supplemental cash flow information:
Interest paid	26	34
Income taxes paid	149	219
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)	$ (303)