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Stock-based compensation (Details Textual) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
Oct. 21, 2014
Jul. 14, 2014
May 16, 2014
Apr. 25, 2014
Jan. 09, 2014
Aug. 15, 2008
Dec. 31, 2014
Jan. 08, 2015
Dec. 31, 2013
Dec. 31, 2012
Class of Warrant or Right, Outstanding             30,000us-gaap_ClassOfWarrantOrRightOutstanding      
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 0.63us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1      
Common Stock Value To Be Issued             $ 12,500issm_CommonStockValueToBeIssued   $ 12,500issm_CommonStockValueToBeIssued  
Stock Issued During Period, Shares, New Issues 69,446us-gaap_StockIssuedDuringPeriodSharesNewIssues 78,126us-gaap_StockIssuedDuringPeriodSharesNewIssues   73,530us-gaap_StockIssuedDuringPeriodSharesNewIssues 78,126us-gaap_StockIssuedDuringPeriodSharesNewIssues          
Stock Issued During Period Per Share Value Of New Issues $ 0.18issm_StockIssuedDuringPeriodPerShareValueOfNewIssues $ 0.16issm_StockIssuedDuringPeriodPerShareValueOfNewIssues   $ 0.17issm_StockIssuedDuringPeriodPerShareValueOfNewIssues $ 0.16issm_StockIssuedDuringPeriodPerShareValueOfNewIssues          
Stock Issued During Period, Value, New Issues 12,500us-gaap_StockIssuedDuringPeriodValueNewIssues 12,500us-gaap_StockIssuedDuringPeriodValueNewIssues   12,500us-gaap_StockIssuedDuringPeriodValueNewIssues 12,500us-gaap_StockIssuedDuringPeriodValueNewIssues          
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted     200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted     100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number             200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber   0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Allocated Share-based Compensation Expense             15,000us-gaap_AllocatedShareBasedCompensationExpense      
Warrant [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award             July 2014      
Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date     May 15, 2019     Aug. 15, 2013        
Subsequent Event [Member]                    
Stock Issued During Period, Shares, New Issues               83,334us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Stock Issued During Period Per Share Value Of New Issues               $ 0.15issm_StockIssuedDuringPeriodPerShareValueOfNewIssues
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Stock Issued During Period, Value, New Issues               12,500us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Four Directors [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted     25,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
/ us-gaap_TitleOfIndividualAxis
= issm_FourDirectorsMember
    25,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
/ us-gaap_TitleOfIndividualAxis
= issm_FourDirectorsMember
       
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price     0.17us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_TitleOfIndividualAxis
= issm_FourDirectorsMember
             
Chief Financial Officer [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted     100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefFinancialOfficerMember
             
Two Directors [Member]                    
Common Stock Value To Be Issued             $ 12,500issm_CommonStockValueToBeIssued
/ us-gaap_TitleOfIndividualAxis
= issm_TwoDirectorsMember
     
Stock Issued During Period, Shares, New Issues 34,723us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_TitleOfIndividualAxis
= issm_TwoDirectorsMember
39,063us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_TitleOfIndividualAxis
= issm_TwoDirectorsMember
  36,765us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_TitleOfIndividualAxis
= issm_TwoDirectorsMember
39,063us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_TitleOfIndividualAxis
= issm_TwoDirectorsMember
         
Two Directors [Member] | Subsequent Event [Member]                    
Stock Issued During Period, Shares, New Issues               41,667us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= issm_TwoDirectorsMember