Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Cash flows from operating activities:
Net loss	$ (7,579)	$ (15,685)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	5,806	9,184
Stock-based compensation	611	575
Provision for doubtful accounts, net of charge offs	0	200
Provision for inventory obsolescence	23	140
Gross profit from sale of lease pool equipment	(987)	(1,848)
Loss on sale of business	0	4,905
Deferred tax expense	135	(365)
Non-Current prepaid tax	(157)	472
Changes in:
Accounts receivable	(1,020)	(878)
Unbilled revenue	(302)	(2,435)
Inventories	(2,835)	(1,304)
Prepaid expenses and other current assets	240	(1,158)
Accounts payable, accrued expenses and other current liabilities	(392)	(626)
Deferred revenue	1,979	527
Foreign exchange losses net of gains	230	336
Net cash used in operating activities	(4,248)	(7,960)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(1,939)	(1,424)
Acquisition of assets	0	(3,000)
Purchases of property and equipment	(893)	(696)
Sale of used lease pool equipment	1,415	4,124
Sale of business, net of cash sold	239	(147)
Net cash used in investing activities	(1,178)	(1,143)
Cash flows from financing activities:
Proceeds from exercise of stock options	25	0
Net proceeds from preferred stock offering	2,211	6,135
Preferred stock dividends	(1,492)	(1,245)
Net cash provided by financing activities	744	4,890
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	(68)	(314)
Net decrease in cash, cash equivalents and restricted cash	(4,750)	(4,527)
Cash, cash equivalents and restricted cash, beginning of period	9,549	10,146
Cash, cash equivalents and restricted cash, end of period	4,799	5,619
Supplemental cash flow information:
Interest paid	40	2
Income taxes paid	325	414
Purchases of seismic equipment held for lease in accounts payable at end of period	753	264
Purchase of seismic equipment held for lease through settlement of accounts receivable	$ 826	$ 0