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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Cash flows from operating activities:      
Net (loss) income $ (38,736) $ (9,192) $ 4,768
Adjustments to reconcile net (loss) income to net cash provided by operating activities:      
Depreciation and amortization 32,111 36,986 31,037
Stock-based compensation 1,293 1,298 1,143
Impairment of intangible assets 3,609    
Provision for doubtful accounts, net of charge offs 2,201 2,835 1,048
Provision for inventory obsolescence 407 8 (60)
Gross profit from sale of lease pool equipment (1,384) (2,061) (4,556)
Excess tax benefit from exercise of non-qualified stock options and restricted shares     5
Deferred tax expense (benefit) 10,309 (3,237) (2,204)
Changes in non-current income taxes payable     32
Foreign exchange losses net of gains 466 3,258  
Changes in:      
Trade accounts and contracts receivable (238) 605 (9,142)
Inventories 677 (279) (2,836)
Income taxes receivable and payable (1,716) 1,701 3,215
Accounts payable, accrued expenses and other current liabilities 1,241 (2,303) 100
Prepaids and other current assets, net 4,807 (4,414) (1,335)
Net cash provided by operating activities 15,047 25,205 21,215
Cash flows from investing activities:      
Purchases of seismic equipment held for lease (2,173) (19,449) (43,509)
Acquisition of businesses (10,000) (14,500)  
Purchases of property and equipment (336) (451) (549)
Sales of used lease pool equipment 2,240 3,158 6,851
Net cash used in investing activities (10,269) (31,242) (37,207)
Cash flows from financing activities:      
Net (payments on) proceeds from revolving line of credit (2,600) (5,000) 18,000
Payments on borrowings (3,217) (893) (136)
Proceeds from term loan   10,000  
Net proceeds from (purchases of) short-term investment 182 (99) 652
Proceeds from issuance of common stock upon exercise of options   320 498
Purchase of treasury stock (3) (9,762) (2,200)
Excess tax benefit from exercise of non-qualified stock options 0 0 (5)
Net cash (used in) provided by financing activities (5,638) (5,434) 16,809
Effect of changes in foreign exchange rates on cash and cash equivalents (546) 1,484 (805)
Net (decrease) increase in cash and cash equivalents (1,406) (9,987) 12
Cash and cash equivalents, beginning of year 5,175 15,162 15,150
Cash and cash equivalents, end of year $ 3,769 $ 5,175 $ 15,162