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ROYALTIES (Details Textual) (Sensormedics [Member], USD $)
3 Months Ended 9 Months Ended
Apr. 30, 2014
Apr. 30, 2014
Sensormedics [Member]
   
Indefinite-lived Intangible Assets [Line Items]    
Royalty Income, Nonoperating $ 0us-gaap_RoyaltyIncomeNonoperating
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= nimu_SensormedicsMember
$ 1,000us-gaap_RoyaltyIncomeNonoperating
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= nimu_SensormedicsMember