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Number of Performance Measures

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Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Withheld Minimum Statutory Taxes

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Share Based Compensation Arrangement By Share Based Payment Award Options Received In Period

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Net number of non-option equity instruments granted to participants.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Number of share instruments newly issued under a share-based compensation plan.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Purchase price of common stock expressed as a percentage of its fair value.

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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation (Narrative) (Details)		3 Months Ended		6 Months Ended
Stock-Based Compensation (Narrative) (Details)	Oct. 18, 2016 item shares	Feb. 28, 2017 USD ($) $ / shares shares	Feb. 27, 2016 USD ($)	Feb. 28, 2017 USD ($) $ / shares shares	Feb. 27, 2016 USD ($)	Aug. 31, 2016 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares awarded				55,014
Stock-based compensation expense \| $		$ 1,564,000	$ 1,111,000	$ 2,777,000	$ 1,874,000
Shares issued under terms of the award		124,304		137,843
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price \| $ / shares		$ 11.67		$ 11.67		$ 11.41
Stock options exercised				62,500
Stock Options [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised		62,500
Stock Options [Member] \| Common Stock [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares received from exercised options		30,079
Aggregate intrinsic value \| $		$ 500,000
Number of shares reduced, withheld for minimum statutory taxes		10,021
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New shares granted	183,381
Stock-based incremental compensation expense from plan modification \| $				$ 0
Number of individual vesting conditions \| item	6
Number of performance measures \| item	2
Stock-based compensation expense \| $		$ 1,391,000	966,000	2,469,000	1,591,000
Performance Awards [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Life of awards	6 years
Unvested Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $		125,000	113,000	237,000	225,000
Unvested Share Awards [Member] \| Director [Member] \| Fiscal 2017 Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Whole-share grant per eligible director \| $				$ 75,000
Vesting period of awards				1 year
Unvested Share Awards [Member] \| Board of Directors [Member] \| Fiscal 2017 Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense \| $		400,000		$ 400,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense \| $		$ 33,000	$ 32,000	$ 56,000	$ 58,000
Price of common stock as a percent of the average fair market value				85.00%
Shares issued to employee stock purchase plan participants		7,238		18,281
Tranche One and Two [Member] \| Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares awarded		36,676