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STOCK-BASED COMPENSATION (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Apr. 30, 2015
Apr. 30, 2014
Nov. 30, 2010
Allocated Share-based Compensation Expense $ 0us-gaap_AllocatedShareBasedCompensationExpense $ 1,000us-gaap_AllocatedShareBasedCompensationExpense $ 0us-gaap_AllocatedShareBasedCompensationExpense $ 4,000us-gaap_AllocatedShareBasedCompensationExpense  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period     75,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod    
2000 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= nimu_TwoThousandPlanMember
  2,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= nimu_TwoThousandPlanMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Description     Company’s Common Stock as of the grant date or an exercise price of not less than 110% of the fair value for a 10% shareholder.    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period     378,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod
/ us-gaap_AwardTypeAxis
= nimu_TwoThousandPlanMember
   
2011 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         4,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= nimu_TwoThousandElevenPlanMember