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Shareholders' Equity - Warrants (Details Narrative) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Class of Warrant or Right [Line Items]      
Warrants, exercised 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised (17,801,352)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised  
Warrants, granted 15,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 10,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod  
Warrants      
Class of Warrant or Right [Line Items]      
Common stock issued   6,727,972us-gaap_SharesIssued
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
[1]  
Proceeds from issuance of stock   420,389us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
[2]  
Proceeds applied to interest   110,733us-gaap_InterestPaidNet
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
[3]  
Warrants, exercised   17,801,352us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
[4]  
Potential total number of warrants to be issued     4,502,520inis_PotentialTotalNumberOfWarrantsToBeIssued
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
Exercise price of warrants     $ 0.30us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
Risk free interest rate of fair value of warrants or options     0.65%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
Expected volatility of fair value of warrants or options     88.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
Expected life of fair value of warrants or options     5 years
Warrants | Class K      
Class of Warrant or Right [Line Items]      
Discounted warrant exercise price   Issued July 27, 2012 from $0.30 to $0.09 under Option 1 and to $0.06 under Option 2  
Warrants | Class I      
Class of Warrant or Right [Line Items]      
Discounted warrant exercise price   Issued on October 29, 2010 from $0.40 to $0.09 under Option 1 and to $0.06 under Option 2  
Warrants | Class H      
Class of Warrant or Right [Line Items]      
Discounted warrant exercise price   Issued August 24, 2011 from $0.22 to $0.09 under Option 1 and to $0.06 under Option 2  
Warrants | Class F      
Class of Warrant or Right [Line Items]      
Discounted warrant exercise price   Issued on November 7, 2008 from $0.30 to $0.09 under Option 1 and to $0.06 under Option 2  
Warrants, expired   3,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExpirations
/ inis_ClassFwarrantsAxis
= inis_ClassFwarrantMember
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
 
[1] 557,021 shares of common stock was issued under Option 1. 6,170,951 shares of common stock was issued under Option 2.
[2] $50,132 proceeds received from issuance of stock under Option 1. $370,257 proceeds received from issuance of stock under Option 2.
[3] $46,193 proceeds applied to interest under Option 1. $64,540 proceeds applied to interest under Option 2.
[4] 557,021 warrants were exercised under Option 1. 17,244,331 warrants were exercised under Option 2.