CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Cash flows from operating activities:
Net loss	$ (6,644)	$ (13,246)
Adjustments to reconcile net loss to net cash used in operating activities:
PPP loan forgiveness	(850)	0
Depreciation and amortization	1,226	3,210
Stock-based compensation	236	449
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	350	234
Gross profit from sale of lease pool equipment	0	(1,326)
Gross profit from sale of other equipment	(155)	0
Deferred tax expense	0	263
Changes in:
Accounts receivable	(140)	4,404
Unbilled revenue	21	(9)
Inventories	(542)	(675)
Prepaid expenses and other current and long-term assets	(260)	766
Income taxes receivable and payable	(63)	0
Accounts payable, accrued expenses and other current liabilities	375	(1,583)
Deferred revenue	(292)	87
Net cash used in operating activities	(7,191)	(2,566)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	0	(110)
Purchases of property and equipment	(14)	(302)
Sale of used lease pool equipment	0	2,010
Sale of assets held for sale	484	0
Sale of a business	761	0
Net cash provided by investing activities	1,231	1,598
Cash flows from financing activities:
Purchase of treasury stock	(2)	0
Net proceeds from preferred stock offering	4,502	0
Net proceeds from common stock offering	43	0
Preferred stock dividends	(1,160)	(1,118)
Proceeds from PPP loans	0	1,607
Net cash provided by financing activities	3,383	489
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	22	(117)
Net decrease in cash, cash equivalents and restricted cash	(2,555)	(596)
Cash, cash equivalents and restricted cash, beginning of period	4,611	3,234
Cash, cash equivalents and restricted cash, end of period	2,056	2,638
Supplemental cash flow information:
Interest paid	18	23
Income taxes paid	$ 147	$ 246