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Employees' Retirement Plan (Details) (USD $) | 3 Months Ended | 9 Months Ended
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Apr. 30, 2015 | Apr. 30, 2014 | Apr. 30, 2015 | Apr. 30, 2014
Employees' Retirement Plan: [Abstract] |  |  |  |
Pension Contributions | $ 70,811us-gaap_PensionContributions | $ 105,773us-gaap_PensionContributions | $ 281,306us-gaap_PensionContributions | $ 297,143us-gaap_PensionContributions
Employer contributions | $ 10,853us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 11,271us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 34,761us-gaap_DefinedBenefitPlanContributionsByEmployer | $ 32,824us-gaap_DefinedBenefitPlanContributionsByEmployer

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- Details
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition The amount of cash or cash equivalents contributed by the entity to fund its pension plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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