Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Cash flows from operating activities:
Net loss	$ (11,287)	$ (19,840)	$ (21,069)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	7,768	11,814	16,637
Stock-based compensation	854	781	903
Impairment of intangible assets	760	0	1,466
Provision for doubtful accounts, net of charge offs	2,000	200	1,013
Provision for inventory obsolescence	298	140	815
Gross profit from sale of lease pool equipment	(1,197)	(2,367)	(4,906)
Loss on sale of business	0	5,405	0
Deferred tax expense	503	(376)	(20)
Non-current prepaid tax	50	1,577	182
Changes in:
Accounts receivable	(1,723)	1,292	4,405
Unbilled revenue	(327)	(340)	0
Inventories	(2,810)	(781)	685
Accounts payable, accrued expenses and other current liabilities	(178)	(722)	(455)
Prepaids expenses and other current assets, net	(506)	(1,382)	1,002
Deferred revenue	(335)	567	0
Foreign exchange losses net of gains	313	171	61
Net assets held for sale	0	(1,596)	0
Net cash (used in) provided by operating activities	(5,817)	(5,457)	719
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(2,955)	(1,717)	(909)
Acquisition of assets	0	(3,000)	0
Purchases of property and equipment	(1,036)	(814)	(407)
Sales of used lease pool equipment	1,664	5,663	10,313
Sale of business, net of cash sold	239	(147)	0
Net cash (used in) provided by investing activities	(2,088)	(15)	8,997
Cash flows from financing activities:
Net payments on revolving line of credit	0	0	(3,500)
Payments on term loan and other borrowings	0	0	(2,807)
Net proceeds from preferred stock offering	3,773	6,853	4,174
Preferred stock dividends	(2,050)	(1,708)	(905)
Proceeds from exercise of stock options	26	0	0
Net cash provided by (used in) financing activities	1,749	5,145	(3,038)
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	(159)	(270)	(43)
Net increase (decrease) in cash and cash equivalents including cash classified within current assets held for sale	0	458	0
Less: Net increase (decrease) in cash classified within current assets held for sale	0	(458)	0
Net (decrease) increase in cash, cash equivalents and restricted cash	(6,315)	(597)	6,635
Cash, cash equivalents and restricted cash, beginning of period	9,549	10,146	3,511
Cash, cash equivalents and restricted cash, end of period	$ 3,234	$ 9,549	$ 10,146