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Certificates of Deposit (Details) (USD $)
Mar. 31, 2015
Under 90 Days [Member]  
Summary of Investment Holdings [Line Items]  
Certificates of Deposit $ 5,563,126us-gaap_InvestmentOwnedAtCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= isr_MaturityLessThan90DaysMember		 [1]
91 Days to Six Months [Member]  
Summary of Investment Holdings [Line Items]  
Certificates of Deposit 3,518,701us-gaap_InvestmentOwnedAtCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= isr_Maturity90DaysTo6MonthsMember		 [1]
Six Months to 1 Year [Member]  
Summary of Investment Holdings [Line Items]  
Certificates of Deposit    [1]
1 to 3 Years [Member]  
Summary of Investment Holdings [Line Items]  
Certificates of Deposit $ 10,145,978us-gaap_InvestmentOwnedAtCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= isr_Maturity1YearTo3YearsMember		 [1]
[1] Certificate of Deposit Account Registry Service (CDARS), which is a system method by which the Company may access multi-million-dollar Certificates of Deposit (CDs) deposits in principal and interest amounts that are fully insured by the Federal Deposit Insurance Corporation (FDIC) with original maturities that were greater than three months and up to three years at the time of purchase.