Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Cash flows from operating activities:
Net loss	$ (21,069)	$ (33,153)	$ (38,736)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	16,637	28,275	32,111
Stock-based compensation	903	737	1,293
Impairment of intangible assets	1,466	0	3,609
Provision for doubtful accounts, net of charge offs	1,013	750	2,201
Provision for inventory obsolescence	815	75	407
Gross (profit) loss from sale of lease pool equipment	(4,906)	298	(1,384)
Deferred tax expense	(20)	934	10,309
Non-current prepaid tax	182	0	0
Changes in:
Trade accounts and contracts receivable	4,405	7,345	(238)
Inventories	685	850	677
Income taxes receivable and payable	0	475	(1,716)
Accounts payable, accrued expenses and other current liabilities	(455)	(2,189)	1,241
Prepaids and other current assets, net	1,002	(1,327)	4,807
Foreign exchange losses net of gains	61	84	466
Net cash provided by operating activities	719	3,154	15,047
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(909)	(636)	(2,173)
Acquisition of businesses	0	0	(10,000)
Purchases of property and equipment	(407)	(283)	(336)
Sales of used lease pool equipment	10,313	5,331	2,240
Net cash provided by (used in) investing activities	8,997	4,412	(10,269)
Cash flows from financing activities:
Net payments on revolving line of credit	(3,500)	(10,900)	(2,600)
Payments on term loan and other borrowings	(2,807)	(3,217)	(3,217)
Net (purchases of) proceeds from short-term investment	0	0	182
Net proceeds from preferred stock offering	4,174	7,294	0
Preferred stock dividends	(905)	(486)	0
Purchase of treasury stock	0	(4)	(3)
Net cash used in financing activities	(3,038)	(7,313)	(5,638)
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	(43)	(511)	(546)
Net increase (decrease) in cash, cash equivalents and restricted cash	6,635	(258)	(1,406)
Cash and cash equivalents, beginning of year	3,511	3,769	5,175
Cash and cash equivalents, end of year	$ 10,146	$ 3,511	$ 3,769