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Income Taxes (Details 2) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2011 | Aug. 31, 2012 | Aug. 31, 2011 | Aug. 31, 2010
Income Taxes |  |  |  |
Change in beginning of the year valuation allowance as a result of changes in estimates | $ 600,000 | $ 0 | $ 584,000 | $ (1,163,000)
Net Operating Loss Carryforwards |  |  |  |
Total unused net operating loss carryforwards and income tax credits |  | 38,266,000 |  |
Reconciliation of the beginning and ending balances of the unrecognized tax benefits |  |  |  |
Unrecognized benefit - beginning of year |  | 330,000 | 252,000 | 119,000
Gross increases - current year tax positions |  |  |  | 89,000
Gross increases - prior years tax positions |  |  | 78,000 | 44,000
Settlements of prior year's tax positions |  | (185,000) |  |
Unrecognized benefit - end of year | 330,000 | 145,000 | 330,000 | 252,000
U.S. Federal |  |  |  |
Net Operating Loss Carryforwards |  |  |  |
Net operating loss carryforwards |  | 6,976,000 |  |
State |  |  |  |
Net Operating Loss Carryforwards |  |  |  |
Net operating loss carryforwards |  | 489,000 |  |
Foreign |  |  |  |
Net Operating Loss Carryforwards |  |  |  |
Net operating loss carryforwards (expiring over the next 5 years) |  | 2,224,000 |  |
Net operating loss carryforwards (expiring in more than 5 years) |  | 26,665,000 |  |
Income tax credit carryovers |  | $ 1,912,000 |  |

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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, 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=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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