Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Cash flows from operating activities:
Net loss	$ (5,551)	$ (10,494)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,960	6,399
Stock-based compensation	341	368
Provision for doubtful accounts, net of charge offs	0	200
Provision for inventory obsolescence	0	115
Gross profit from sale of lease pool equipment	(780)	(1,246)
Deferred tax expense	135	(306)
Changes in:
Accounts receivable	100	2,227
Unbilled revenue	3	(341)
Inventories	(2,372)	(1,406)
Prepaid expenses and other current assets	(11)	(1,435)
Income taxes receivable and payable	(47)	665
Accounts payable, accrued expenses and other current liabilities	632	(1,551)
Deferred revenue	(50)	942
Foreign exchange losses net of gains	137	64
Net cash used in operating activities	(3,503)	(5,799)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(230)	(1,386)
Acquisition of assets	0	(3,000)
Purchases of property and equipment	(573)	(487)
Sale of used lease pool equipment	1,186	2,792
Sale of business, net of cash sold	239	0
Net cash provided by (used in) investing activities	622	(2,081)
Cash flows from financing activities:
Proceeds from exercise of stock options	26	0
Net proceeds from preferred stock offering	1,980	5,450
Preferred stock dividends	(970)	(796)
Net cash provided by financing activities	1,036	4,654
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	(65)	189
Net decrease in cash, cash equivalents and restricted cash	(1,910)	(3,037)
Cash, cash equivalents and restricted cash, beginning of period	9,549	10,146
Cash, cash equivalents and restricted cash, end of period	7,639	7,109
Supplemental cash flow information:
Interest paid	27	2
Income taxes paid	182	268
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 0	$ 264