Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Cash flows from operating activities:
Net (loss) income	$ (6,085)	$ 390
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	16,555	18,545
Stock-based compensation	519	696
Provision for inventory obsolescence	90	44
Provision for doubtful accounts, net of charge offs	600
Gross profit from sale of lease pool equipment	(216)	(1,563)
Excess tax benefit from exercise of non-qualified stock options and restricted shares	(72)	(123)
Deferred tax benefit	(3,301)	(2,009)
Changes in working capital items:
Accounts receivable	5,338	637
Contracts and notes receivable		122
Inventories	(3,349)	416
Prepaid expenses and other current assets	3,892	(2,239)
Income taxes payable	(640)	850
Accounts payable, accrued expenses, other current liabilities and deferred revenue	(661)	3,384
Foreign exchange gains/losses	(1,020)
Net cash provided by operating activities	11,650	19,150
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(1,874)	(13,716)
Acquisition of business		(14,500)
Purchases of property and equipment	(171)	(218)
Sale of used lease pool equipment	399	2,386
Net cash used in investing activities	(1,646)	(26,048)
Cash flows from financing activities:
Net (payments on) proceeds from revolving line of credit	(10,500)	3,000
Payments on term loan and other borrowings	(1,609)	(67)
Net proceeds from short-term investments	113	85
Proceeds from issuance of common stock upon exercise of options		37
Purchase of treasury stock		(2,187)
Excess tax benefit from exercise of non-qualified stock options and restricted shares	72	123
Net cash (used in) provided by financing activities	(11,924)	991
Effect of changes in foreign exchange rates on cash and cash equivalents	(455)	172
Net change in cash and cash equivalents	(2,375)	(5,735)
Cash and cash equivalents, beginning of period	5,175	15,162
Cash and cash equivalents, end of period	2,800	9,427
Supplemental cash flow information:
Interest paid	397	392
Income taxes paid	1,203	1,376
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 234	$ 3,426