CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 98,556	$ 101,282
Cost of products sold	45,013	45,451
Gross profit	53,543	55,831
Operating expenses:
Selling, general and administrative	32,599	32,731
Advertising and sales promotion	5,590	5,966
Amortization of definite-lived intangible assets	650	733
Total operating expenses	38,839	39,430
Income from operations	14,704	16,401
Other income (expense):
Interest income	25	51
Interest expense	(442)	(710)
Other income (expense), net	5	376
Income before income taxes	14,292	16,118
Provision for income taxes	2,098	2,839
Net income	$ 12,194	$ 13,279
Earnings per common share:
Basic	$ 0.88	$ 0.95
Diluted	$ 0.88	$ 0.95
Shares used in per share calculations:
Basic	13,714	13,846
Diluted	13,746	13,882