CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 100,049	$ 101,335	$ 198,605	$ 202,617
Cost of products sold	46,447	45,177	91,460	90,628
Gross profit	53,602	56,158	107,145	111,989
Operating expenses:
Selling, general and administrative	29,906	30,591	62,505	63,322
Advertising and sales promotion	4,857	5,184	10,447	11,150
Amortization of definite-lived intangible assets	654	668	1,304	1,401
Total operating expenses	35,417	36,443	74,256	75,873
Income from operations	18,185	19,715	32,889	36,116
Other income (expense):
Interest income	28	45	53	96
Interest expense	(593)	(685)	(1,035)	(1,395)
Other (expense) income, net	(229)	497	(224)	873
Income before income taxes	17,391	19,572	31,683	35,690
Provision for income taxes	3,064	3,666	5,162	6,505
Net income	$ 14,327	$ 15,906	$ 26,521	$ 29,185
Earnings per common share:
Basic	$ 1.04	$ 1.15	$ 1.92	$ 2.10
Diluted	$ 1.04	$ 1.14	$ 1.92	$ 2.09
Shares used in per share calculations:
Basic	13,712	13,828	13,713	13,837
Diluted	13,737	13,857	13,741	13,869