Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Cash flows from operating activities:
Net loss	$ (23,299)	$ (11,898)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	21,927	24,432
Stock-based compensation	587	724
Provision for inventory obsolescence	65	134
Provision for doubtful accounts, net of charge offs		1,200
Gross profit from sale of lease pool equipment	(1,420)	(1,027)
Excess tax benefit from exercise of non-qualified stock options and restricted shares		(125)
Deferred tax benefit	(582)	(5,285)
Changes in working capital items:
Trade accounts and contracts receivable	10,308	268
Inventories	471	(982)
Prepaid expenses and other current assets	(893)	3,925
Income taxes payable	384	518
Accounts payable, accrued expenses, other current liabilities and deferred revenue	(4,242)	2,547
Foreign exchange gains net of losses	381	(532)
Net cash provided by operating activities	3,687	13,899
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(604)	(2,128)
Purchases of property and equipment	(117)	(227)
Sale of used lease pool equipment	2,256	1,566
Net cash provided by (used in) investing activities	1,535	(789)
Cash flows from financing activities:
Net payments on revolving line of credit	(9,400)	(11,500)
Payments on term loan and other borrowings	(2,414)	(2,413)
Net proceeds from short-term investments		182
Net proceeds from preferred stock offering	6,975
Preferred stock dividends	(294)
Purchase of treasury stock	(2)	(3)
Excess tax benefit from exercise of non-qualified stock options and restricted shares		125
Net cash used in financing activities	(5,135)	(13,609)
Effect of changes in foreign exchange rates on cash and cash equivalents	(624)	(110)
Net change in cash and cash equivalents	(537)	(609)
Cash and cash equivalents, beginning of period	3,769	5,175
Cash and cash equivalents, end of period	3,232	4,566
Supplemental cash flow information:
Interest paid	610	538
Income taxes paid	705	1,405
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 160	$ 8