Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015
Cash flows from operating activities:
Net loss	$ (15,969)	$ (6,085)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	14,910	16,555
Stock-based compensation	433	519
Provision for inventory obsolescence	43	90
Provision for doubtful accounts, net of charge offs		600
Gross profit from sale of lease pool equipment	(1,456)	(216)
Excess tax benefit from exercise of non-qualified stock options and restricted shares		(72)
Deferred tax benefit	(375)	(3,301)
Changes in working capital items:
Trade accounts and contracts receivable	8,769	5,338
Inventories	181	(3,349)
Prepaid expenses and other current assets	(673)	3,892
Income taxes payable	658	(640)
Accounts payable, accrued expenses, other current liabilities and deferred revenue	(4,014)	(661)
Foreign exchange gains net of losses	577	(1,020)
Net cash provided by operating activities	3,084	11,650
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(583)	(1,874)
Purchases of property and equipment	(77)	(171)
Sale of used lease pool equipment	2,169	399
Net cash provided by (used in) investing activities	1,509	(1,646)
Cash flows from financing activities:
Net payments on revolving line of credit	(9,400)	(10,500)
Payments on term loan and other borrowings	(1,612)	(1,609)
Net proceeds from short-term investments		113
Net proceeds from preferred stock offering	7,117
Preferred stock dividends	(114)
Excess tax benefit from exercise of non-qualified stock options and restricted shares		72
Net cash used in financing activities	(4,009)	(11,924)
Effect of changes in foreign exchange rates on cash and cash equivalents	(857)	(455)
Net change in cash and cash equivalents	(273)	(2,375)
Cash and cash equivalents, beginning of period	3,769	5,175
Cash and cash equivalents, end of period	3,496	2,800
Supplemental cash flow information:
Interest paid	504	397
Income taxes paid	529	1,203
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 148	$ 234