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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards | $ 25,241 |  |  |
Income tax benefit from foreign tax credits |  |  | $ 600 |
Valuation allowance against deferred tax assets | 612 | $ 301 |  |
Increase valuation allowance by | (129) | (301) |  |
Valuation allowance | 400 |  |  |
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate | 1,600 | 2,100 |  |
Unrecognized tax benefits | 2,359 | 3,024 | 3,115 | $ 3,491
Balance of interest and penalties related to uncertain tax positions | 300 | 300 |  |
Reductions for tax positions of prior years resulting from the lapse of applicable statute of limitations | (634) | (212) | (339) |
Reduced income tax benefit | 100 |  |  |
Acquired NOL [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards | 7,741 |  |  |
Valuation allowance against deferred tax assets | 200 |  |  |
August 31, 2017 [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating loss carryforwards | 17,500 |  |  |
Additional Paid-in Capital [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Reduction of income tax expense in additional paid in capital | $ 168 | $ (52) | $ 137 |

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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP). + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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