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Percent of shares plan participants are entitled to

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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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Date the equity-based award expires, in CCYY-MM-DD format.

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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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Number of additional shares authorized for issuance under an established share-based compensation plan.

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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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Stock-Based Compensation (Narrative) (Details)			3 Months Ended	6 Months Ended
Stock-Based Compensation (Narrative) (Details)	Jan. 26, 2018 shares	Nov. 14, 2017 item shares	Feb. 28, 2018 USD ($) shares	Feb. 28, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under terms of the award			40,814	292,048
Shares issued to employee stock purchase plan participants			21,091
Number of shares reduced, withheld for minimum statutory taxes			1,934	104,699
Fiscal 2018 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of tranches \| item		3
Life of awards		3 years
Expiration date		Aug. 31, 2020
Unvested Share Awards [Member] \| Director [Member] \| Fiscal 2018 Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Whole-share grant per eligible director \| $				$ 100,000
Vesting period of awards				1 year
Unvested Share Awards [Member] \| Board of Directors [Member] \| Fiscal 2018 Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense \| $			$ 600,000	$ 600,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price of common stock as a percent of the average fair market value				85.00%
Shares issued to employee stock purchase plan participants			11,204
2017 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized additional shares of common stock for issuance	1,000,000
Tranche One [Member] \| Fiscal 2018 Long Term Incentive Plan Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New shares granted		42,883
Percent of shares plan participants are entitled to		25.00%
Vesting period of awards		3 years
Tranche Two and Three [Member] \| Fiscal 2018 Long Term Incentive Plan Award [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of performance award to be granted		50.00%
Tranche Two and Three [Member] \| Fiscal 2018 Long Term Incentive Plan Award [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of performance award to be granted		200.00%
New shares granted		257,300