Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 42,572	$ 38,629	$ 2,172
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	19,177	19,396	14,018
(Gain) loss on sale of business	(1,087)	0	301
Provision (benefit) for uncollectible accounts receivable	771	589	(496)
Deferred income taxes	1,911	1,384	(5,686)
Share-based compensation expense	6,186	5,616	4,195
Valuation adjustment for indirect tax credits	0	0	2,795
Foreign currency transaction (gain) loss	(1,934)	1,102	709
Other, net	259	288	272
Changes in assets and liabilities:
Receivables	(11,535)	(9,523)	(7,969)
Inventories	(38,158)	(14,039)	(16,187)
Other current assets	(8,132)	(6,612)	173
Accounts payable	17,993	(691)	2,119
Other current liabilities	18,433	16,673	2,629
Other noncurrent assets and liabilities	(2,488)	(6,778)	4,752
Net cash provided by operating activities	43,968	46,034	3,797
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(26,511)	(21,445)	(23,211)
Proceeds from sale of assets held-for-sale	0	3,955	0
Purchases of marketable securities available-for-sale	(19,356)	(28,041)	0
Proceeds from maturities of marketable securities available-for-sale	18,825	8,548	0
Acquisition of business, net of cash acquired	0	(3,034)	0
Other investing activities, net	(577)	1,503	1,992
Net cash used in investing activities	(27,619)	(38,514)	(21,219)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	3,965	1,545	177
Common stock withheld for payroll tax obligations	(1,269)	(1,111)	(1,124)
Principal payments on long-term debt	(195)	(227)	(205)
Payment of debt issuance costs	0	0	(115)
Dividends paid	(14,166)	(13,645)	(13,375)
Net cash used in financing activities	(11,665)	(13,438)	(14,642)
Effect of exchange rate changes on cash and cash equivalents	1,020	117	(1,519)
Net change in cash and cash equivalents	5,704	(5,801)	(33,583)
Cash and cash equivalents, beginning of period	121,403	127,204	160,787
Cash and cash equivalents, end of period	127,107	121,403	127,204
SUPPLEMENTAL CASH FLOW INFORMATION
Income taxes paid	6,805	7,314	7,887
Interest paid	4,640	4,673	4,671
NONCASH INVESTING ACTIVITIES
Issuance of notes receivable from sale of business	2,051	0	5,589
Earn-out liability related to business acquisition	0	1,195	0
Holdback related to business acquisition	$ 0	$ 300	$ 0