Segment Information (Disaggregation Of Revenue By Geographic Region) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 48,162	$ 53,745	$ 96,486	$ 112,357
Americas [Member]
Disaggregation of Revenue [Line Items]
Revenue	38,828	42,721	77,155	86,756
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,622	7,089	13,428	17,228
Europe/Middle East/Africa [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 2,712	$ 3,935	$ 5,903	$ 8,373

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details