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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Operating activities: |  |  |
Net income | $ 55,908 | $ 65,215 | $ 52,930
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 7,593 | 7,800 | 6,769
Net gains on sales and disposals of property and equipment | (99) | (164) | (115)
Deferred income taxes | (4) | (7,186) | 1,608
Stock-based compensation | 4,446 | 4,195 | 4,138
Unrealized foreign currency exchange losses (gains), net | 651 | (302) | 364
Provision for bad debts | 67 | 121 | (138)
Changes in assets and liabilities: |  |  |
Trade accounts receivable | (7,318) | (5,635) | 482
Inventories | (4,800) | (1,299) | (3,487)
Other assets | 5,802 | (5,353) | (3,514)
Accounts payable and accrued liabilities | (7,948) | 6,107 | 2,827
Accrued payroll and related expenses | 879 | 590 | (6,632)
Other long-term liabilities and income taxes payable | 7,674 | 733 | 340
Net cash provided by operating activities | 62,851 | 64,822 | 55,572
Investing activities: |  |  |
Purchases of property and equipment | (13,282) | (12,356) | (20,150)
Proceeds from sales of property and equipment | 383 | 458 | 430
Purchases of intangible assets |  | (175) |
Purchases of short-term investments |  | (83,704) | (27,136)
Maturities of short-term investments | 219 | 166,984 | 4,565
Net cash provided by (used in) investing activities | (12,680) | 71,207 | (42,291)
Financing activities: |  |  |
Treasury stock purchases | (29,625) | (22,616) | (31,109)
Dividends paid | (32,889) | (29,585) | (26,808)
Proceeds from issuance of common stock |  | 215 | 775
Proceeds from issuance of long-term senior notes |  | 20,000 |
Repayments of long-term senior notes | (800) | (400) |
Net (repayments) proceeds of revolving credit facility | (2,912) | (87,200) | 32,000
Shares withheld to cover taxes upon conversion of equity awards | (2,783) | (1,823) | (1,696)
Net cash used in financing activities | (69,009) | (121,409) | (26,838)
Effect of exchange rate changes on cash and cash equivalents | (2,795) | (2,836) | (252)
Net increase (decrease) in cash and cash equivalents | (21,633) | 11,784 | (13,809)
Cash and cash equivalents at beginning of period | 48,866 | 37,082 | 50,891
Cash and cash equivalents at end of period | 27,233 | 48,866 | 37,082
Cash paid for: |  |  |
Interest | 2,199 | 4,286 | 2,625
Income taxes, net of tax refunds received | $ 16,879 | $ 10,478 | $ 21,933

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- Definition The cash inflow from maturities, prepayments, calls and collections of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Increase (Decrease) In Other Noncurrent Liabilities And Income Taxes Payable + References No definition available. + Details
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