Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Cash flows from operating activities:
Net loss	$ (33,153)	$ (38,736)	$ (9,192)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	28,275	32,111	36,986
Stock-based compensation	737	1,293	1,298
Impairment of intangible assets		3,609
Provision for doubtful accounts, net of charge offs	750	2,201	2,835
Provision for inventory obsolescence	75	407	8
Gross loss (profit) from sale of lease pool equipment	298	(1,384)	(2,061)
Deferred tax expense (benefit)	934	10,309	(3,237)
Changes in:
Trade accounts and contracts receivable	7,345	(238)	605
Inventories	850	677	(279)
Income taxes receivable and payable	475	(1,716)	1,701
Accounts payable, accrued expenses and other current liabilities	(2,189)	1,241	(2,303)
Prepaids and other current assets, net	(1,327)	4,807	(4,414)
Foreign exchange losses net of gains	84	466	3,258
Net cash provided by operating activities	3,154	15,047	25,205
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(636)	(2,173)	(19,449)
Acquisition of businesses		(10,000)	(14,500)
Purchases of property and equipment	(283)	(336)	(451)
Sales of used lease pool equipment	5,331	2,240	3,158
Net cash provided by (used in) investing activities	4,412	(10,269)	(31,242)
Cash flows from financing activities:
Net payments on revolving line of credit	(10,900)	(2,600)	(5,000)
(Payments on) proceeds from term loan and other borrowings	(3,217)	(3,217)	9,107
Net (purchases of) proceeds from short-term investment		182	(99)
Net proceeds from preferred stock offering	7,294
Preferred stock dividends	(486)
Proceeds from issuance of common stock upon exercise of options			320
Purchase of treasury stock	(4)	(3)	(9,762)
Net cash used in financing activities	(7,313)	(5,638)	(5,434)
Effect of changes in foreign exchange rates on cash and cash equivalents	(511)	(546)	1,484
Net decrease in cash and cash equivalents	(258)	(1,406)	(9,987)
Cash and cash equivalents, beginning of year	3,769	5,175	15,162
Cash and cash equivalents, end of year	$ 3,511	$ 3,769	$ 5,175