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Stock-Based Compensation (Narrative) (Details)			3 Months Ended	9 Months Ended
	Jan. 26, 2018 shares	Nov. 14, 2017 item shares	May 31, 2018 USD ($) shares	May 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under terms of the award			9,528	301,576
Number of shares reduced, withheld for minimum statutory taxes			0	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 | $			$ 400,000	$ 400,000
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			9,528	30,619
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

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