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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Operating activities:    
Net income $ 23,623 $ 12,194
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,700 1,957
Net gains on sales and disposals of property and equipment (55) (64)
Deferred income taxes 236 57
Stock-based compensation 2,665 2,214
Unrealized foreign currency exchange losses 52 394
Provision for bad debts 124 6
Changes in assets and liabilities:    
Trade accounts receivable (9,936) 3,630
Inventories (345) (2,358)
Other assets (1,304) 462
Operating lease assets and liabilities, net 6 195
Accounts payable and accrued liabilities 4,590 (332)
Accrued payroll and related expenses 624 (2,234)
Other long-term liabilities and income taxes payable 1,941 (915)
Net cash provided by operating activities 23,921 15,206
Investing activities:    
Purchases of property and equipment (3,812) (5,965)
Proceeds from sales of property and equipment 142 195
Net cash used in investing activities (3,670) (5,770)
Financing activities:    
Treasury stock purchases   (4,957)
Dividends paid (9,199) (8,406)
Proceeds from issuance of long-term senior notes 52,000  
Repayments of long-term senior notes (400) (400)
Net (repayments) proceeds of revolving credit facility (50,000) 7,883
Shares withheld to cover taxes upon conversions of equity awards (3,490) (2,640)
Net cash used in financing activities (11,089) (8,520)
Effect of exchange rate changes on cash and cash equivalents 220 531
Net increase in cash and cash equivalents 9,382 1,447
Cash and cash equivalents at beginning of period 56,462 27,233
Cash and cash equivalents at end of period 65,844 28,680
Supplemental disclosure of noncash investing activities:    
Accrued capital expenditures $ 1,274 $ 1,206