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Convertible Debentures and Notes Payable - Schedule of Debt (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Apr. 30, 2013
Debt Instrument [Line Items]      
Total notes payable $ 4,884,098us-gaap_NotesPayable $ 5,090,353us-gaap_NotesPayable  
Unamortized debt discount (548,479)us-gaap_DebtInstrumentUnamortizedDiscount (688,330)us-gaap_DebtInstrumentUnamortizedDiscount  
Current maturities 1,262,919us-gaap_NotesPayableCurrent 341,373us-gaap_NotesPayableCurrent  
Notes payable, net of current installments and debt discount 3,067,292us-gaap_LongTermNotesPayable 4,060,650us-gaap_LongTermNotesPayable  
Notes Payable      
Debt Instrument [Line Items]      
Notes payable, net of current installments and debt discount 500,000us-gaap_LongTermNotesPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
500,000us-gaap_LongTermNotesPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
596,816us-gaap_LongTermNotesPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
Notes Payable | Related Parties      
Debt Instrument [Line Items]      
Notes payable current and noncurrent 500,000us-gaap_NotesAndLoansPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RelatedPartyTransactionAxis
= inis_RelatedPartyMember
500,000us-gaap_NotesAndLoansPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RelatedPartyTransactionAxis
= inis_RelatedPartyMember
 
Note payable interest rate 6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RelatedPartyTransactionAxis
= inis_RelatedPartyMember
6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RelatedPartyTransactionAxis
= inis_RelatedPartyMember
 
Note payable payment terms All principal and interest due on December 31, 2017, secured    
Notes Payable | Nuclear Regulatory Commission      
Debt Instrument [Line Items]      
Notes payable current and noncurrent 254,198us-gaap_NotesAndLoansPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ inis_NuclearRegulatoryCommissionAxis
= inis_NuclearRegulatoryCommissionMember
460,453us-gaap_NotesAndLoansPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ inis_NuclearRegulatoryCommissionAxis
= inis_NuclearRegulatoryCommissionMember
 
Note payable interest rate 1.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ inis_NuclearRegulatoryCommissionAxis
= inis_NuclearRegulatoryCommissionMember
1.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ inis_NuclearRegulatoryCommissionAxis
= inis_NuclearRegulatoryCommissionMember
 
Note payable payment terms Monthly installments of $17,500, unsecured    
Convertible Notes | Convertible Notes Payable #2      
Debt Instrument [Line Items]      
Notes payable current and noncurrent 3,069,900us-gaap_NotesAndLoansPayable
/ inis_ConvertibleNotesPayableTwoAxis
= inis_ConvertibleNotesPayableTwoMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
3,069,900us-gaap_NotesAndLoansPayable
/ inis_ConvertibleNotesPayableTwoAxis
= inis_ConvertibleNotesPayableTwoMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
 
Note payable interest rate 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ inis_ConvertibleNotesPayableTwoAxis
= inis_ConvertibleNotesPayableTwoMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ inis_ConvertibleNotesPayableTwoAxis
= inis_ConvertibleNotesPayableTwoMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
 
Note payable payment terms Due July 27, 2017    
Convertible Notes | Convertible Notes Payable #1      
Debt Instrument [Line Items]      
Notes payable current and noncurrent $ 1,060,000us-gaap_NotesAndLoansPayable
/ inis_ConvertibleNotesPayableOneAxis
= inis_ConvertibleNotesPayableOneMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
$ 1,060,000us-gaap_NotesAndLoansPayable
/ inis_ConvertibleNotesPayableOneAxis
= inis_ConvertibleNotesPayableOneMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
 
Note payable interest rate 10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ inis_ConvertibleNotesPayableOneAxis
= inis_ConvertibleNotesPayableOneMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ inis_ConvertibleNotesPayableOneAxis
= inis_ConvertibleNotesPayableOneMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleDebtMember
 
Note payable payment terms Due February 20, 2015