Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Cash flows from operating activities:
Net loss	$ (16,836)	$ (7,579)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,920	5,806
Stock-based compensation	562	612
Impairment of intangible assets	2,531	0
Loss on disposal of discontinued operations	1,859	0
Provision for doubtful accounts, net of charge offs	470	23
Provision for inventory obsolescence	256	0
Gross profit from sale of lease pool equipment	(1,326)	(987)
Gross profit from sale of other equipment	(303)	0
Deferred tax expense	(32)	135
Non-current prepaid tax	0	(157)
Changes in:
Accounts receivable	3,640	(1,020)
Unbilled revenue	(6)	(302)
Inventories	762	(2,835)
Prepaid expenses and other current and long-term assets	1,065	240
Income taxes receivable and payable	390	0
Accounts payable, accrued expenses and other current liabilities	(1,827)	(392)
Deferred revenue	72	1,979
Foreign exchange losses net of gains	0	230
Net cash used in operating activities	(4,803)	(4,247)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(110)	(1,939)
Purchases of property and equipment	(64)	(893)
Sale of used lease pool equipment	2,010	1,415
Sale of assets held for sale	734	0
Sale of business, net of cash sold	0	239
Net cash provided by (used in) investing activities	2,570	(1,178)
Cash flows from financing activities:
Proceeds from exercise of stock options	0	25
Net proceeds from preferred stock offering	0	2,211
Net proceeds from common stock offering	1,291	0
Preferred stock dividends	(1,118)	(1,492)
Proceeds from PPP loans	1,607	0
Net cash provided by financing activities	1,780	744
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	(117)	(69)
Net decrease in cash, cash equivalents and restricted cash	(570)	(4,750)
Cash, cash equivalents and restricted cash, beginning of period	3,234	9,549
Cash, cash equivalents and restricted cash, end of period	2,664	4,799
Supplemental cash flow information:
Interest paid	34	40
Income taxes paid	219	325
Purchases of seismic equipment held for lease in accounts payable at end of period	0	753
Purchase of seismic equipment held for lease through settlement of accounts receivable	$ 0	$ 826