Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Cash flows from operating activities:
Net loss	$ (11,898)	$ (7)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	24,432	27,866
Stock-based compensation	724	1,006
Provision for doubtful accounts, net of charge offs	1,200
Provision for inventory obsolescence	134	44
Gross profit from sale of lease pool equipment	(1,027)	(1,845)
Excess tax benefit from exercise of non-qualified stock options and restricted shares	(125)
Deferred tax benefit	(5,285)	(1,742)
Foreign exchange gains/losses	(532)
Changes in working capital items:
Accounts receivable	268	(1,076)
Contracts and notes receivable		(2,632)
Inventories	(982)	630
Prepaid expenses and other current assets	3,925	(7,449)
Income taxes payable	518	(331)
Accounts payable, accrued expenses, other current liabilities and deferred revenue	2,547	2,079
Net cash provided by operating activities	13,899	16,543
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(2,128)	(15,079)
Acquisition of business		(14,500)
Purchases of property and equipment	(227)	(375)
Sale of used lease pool equipment	1,566	2,861
Net cash used in investing activities	(789)	(27,093)
Cash flows from financing activities:
Net (payments on) proceeds from revolving line of credit	(11,500)	2,500
(Payments on) proceeds from term loan and other borrowings	(2,413)	9,926
Net proceeds from short-term investments	182	85
Proceeds from issuance of common stock upon exercise of options		99
Purchase of treasury stock	(3)	(9,776)
Excess tax benefit from exercise of non-qualified stock options and restricted shares	125
Net cash (used in) provided by financing activities	(13,609)	2,834
Effect of changes in foreign exchange rates on cash and cash equivalents	(110)	1,623
Net change in cash and cash equivalents	(609)	(6,093)
Cash and cash equivalents, beginning of period	5,175	15,162
Cash and cash equivalents, end of period	4,566	9,069
Supplemental cash flow information:
Interest paid	538	576
Income taxes paid	1,405	836
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 8	$ 3,438