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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012
Cash flows from operating activities: |  |  |
Net income | $ 4,768 | $ 17,051 | $ 24,321
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 31,037 | 34,939 | 28,774
Stock-based compensation | 1,143 | 1,586 | 1,331
Provision for doubtful accounts, net of charge offs | 1,048 | (428) | 615
Provision for inventory obsolescence | (60) | 163 | 173
Gross profit from sale of lease pool equipment | (4,556) | (5,369) | (4,923)
Excess tax benefit (expense) from exercise of non-qualified stock options and restricted shares | 5 | (420) | (778)
Deferred tax benefit | (2,204) | (4,450) | (285)
Changes in non-current income taxes payable | 32 | (5,059) | 597
Changes in: |  |  |
Trade accounts and contracts receivable | (9,142) | 13,331 | (16,687)
Inventories | (2,836) | 718 | (2,614)
Income taxes payable and receivable | 3,215 | (6,718) | 2,532
Prepaid foreign income tax |  | 3,519 | (440)
Accounts payable, accrued expenses and other current liabilities | 100 | (4,091) | 2,683
Prepaids and other current assets, net | (1,335) | (307) | (435)
Net cash provided by operating activities | 21,215 | 44,257 | 35,958
Cash flows from investing activities: |  |  |
Purchases of seismic equipment held for lease | (43,509) | (44,694) | (62,142)
Purchases of property and equipment | (549) | (965) | (1,525)
Sales of used lease pool equipment | 6,851 | 11,412 | 6,503
Payment for earn-out provision |  | (450) | (148)
Net cash used in investing activities | (37,207) | (34,697) | (57,312)
Cash flows from financing activities: |  |  |
Net proceeds from (payments on) revolving line of credit | 18,000 | (8,550) | (9,100)
Proceeds from equipment notes |  | 147 | 37
Payments on borrowings | (136) | (1,532) | (3,308)
Net proceeds from (purchases of) short-term investment | 652 | (689) | (101)
Proceeds from issuance of common stock upon exercise of options | 498 | 329 | 2,809
Purchase of treasury stock | (2,200) |  |
Net proceeds from public offering of common stock |  |  | 31,028
Excess tax benefit from exercise of non-qualified stock options | (5) | 420 | 778
Net cash provided by (used in) financing activities | 16,809 | (9,875) | 22,143
Effect of changes in foreign exchange rates on cash and cash equivalents | (805) | 178 | (149)
Net increase (decrease) in cash and cash equivalents | 12 | (137) | 640
Cash and cash equivalents, beginning of year | 15,150 | 15,287 | 14,647
Cash and cash equivalents, end of year | $ 15,162 | $ 15,150 | $ 15,287

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- Definition The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The cash outflow for the payment of other borrowing not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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