Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities:
Net loss	$ (2,415)	$ (5,905)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,131	3,303
Stock-based compensation	172	126
Provision for doubtful accounts, net of charge offs	0	(200)
Gross profit from sale of lease pool equipment	(363)	(536)
Deferred tax expense	135	(202)
Changes in:
Accounts receivable	76	2,418
Unbilled revenue	5	(930)
Inventories	(501)	(844)
Prepaid expenses and other current assets	(672)	(1,520)
Income taxes receivable and payable	2	642
Accounts payable, accrued expenses and other current liabilities	(382)	(47)
Deferred revenue	(23)	313
Foreign exchange (gains) losses, net	(16)	16
Net cash used in operating activities	(1,851)	(3,366)
Cash flows from investing activities:
Purchases of seismic equipment held for lease	0	(190)
Acquisition of assets	0	(3,000)
Purchases of property and equipment	(366)	(113)
Sale of used lease pool equipment	730	1,620
Sale of business, net of cash sold	239	0
Net cash (used in) provided by investing activities	603	(1,683)
Cash flows from financing activities:
Net proceeds from preferred stock offering	409	3,812
Preferred stock dividends	(471)	(385)
Net cash provided by (used in) financing activities	(62)	3,427
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	(100)	322
Net decrease in cash, cash equivalents and restricted cash	(1,410)	(1,300)
Cash, cash equivalents and restricted cash, beginning of period	9,549	10,146
Cash, cash equivalents and restricted cash, end of period	8,139	8,846
Supplemental cash flow information:
Interest paid	14	1
Income taxes paid	97	46
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 0	$ 1,186