Basis Of Presentation (Schedule Of Statements Of Operations Impacted By Adoption Of New Accounting Standard) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Revenue	$ 50,356	$ 46,547	$ 104,185	$ 94,479
Cost of sales	14,990	13,803	32,037	28,867
Selling, general, and administrative	35,925	35,097	70,568	68,921
Income tax benefit	(410)	(3,025)	(310)	(4,373)
Net loss	$ (3,517)	$ (2,740)	$ (4,874)	$ (5,132)
Net loss per share:
Basic and diluted	$ (0.25)	$ (0.20)	$ (0.35)	$ (0.37)
Accounting Standards Update 2014-09 [Member]
Revenue	$ 50,356		$ 104,185
Cost of sales	14,990		32,037
Selling, general, and administrative	35,925		70,568
Income tax benefit	410		310
Net loss	$ (3,517)		$ (4,874)
Net loss per share:
Basic and diluted	$ (0.25)		$ (0.35)
Accounting Standards Update 2014-09 [Member] | Without ASC 606 [Member]
Revenue	$ 49,895		$ 102,653
Cost of sales	14,990		32,037
Selling, general, and administrative	35,914		70,486
Income tax benefit	517		652
Net loss	$ (3,860)		$ (5,982)
Net loss per share:
Basic and diluted	$ (0.28)		$ (0.43)
Accounting Standards Update 2014-09 [Member] | Impact Of ASC 606 [Member]
Revenue	$ 461		$ 1,532
Selling, general, and administrative	11		82
Income tax benefit	(107)		(342)
Net loss	$ 343		$ 1,108