Annual report pursuant to Section 13 and 15(d)

Note 6 - Notes Payable (Details)

v2.4.1.9
Note 6 - Notes Payable (Details) (USD $)
 1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
Dec. 31, 2014
Mar. 31, 2014
Jan. 31, 2013
Nov. 30, 2010
Dec. 31, 2014
Dec. 31, 2013
Mar. 06, 2013
Mar. 31, 2013
Dec. 31, 2012
Mar. 06, 2014
Apr. 30, 2011
Note 6 - Notes Payable (Details) [Line Items]                      
Debt Instrument, Face Amount       $ 3,000,000us-gaap_DebtInstrumentFaceAmount              
Debt Instrument, Interest Rate, Stated Percentage       3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage              
Other Nonoperating Expense           1,356,177us-gaap_OtherNonoperatingExpense          
Debt Instrument, Unamortized Discount 3,323,776us-gaap_DebtInstrumentUnamortizedDiscount     2,775,300us-gaap_DebtInstrumentUnamortizedDiscount 3,323,776us-gaap_DebtInstrumentUnamortizedDiscount            
Units Issued During Period (in Shares)       10,714,286mric_UnitsIssuedDuringPeriod              
Proceeds from Issuance or Sale of Equity       3,000,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity              
Units Shares of Common Stock Per Unit       1mric_UnitsSharesOfCommonStockPerUnit              
Stock Issued During Period, Shares, Conversion of Units (in Shares)       10,714,286us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits              
Stock Issued During Period, Value, Conversion of Units       2,775,300us-gaap_StockIssuedDuringPeriodValueConversionOfUnits 9,379,880us-gaap_StockIssuedDuringPeriodValueConversionOfUnits 6,499,550us-gaap_StockIssuedDuringPeriodValueConversionOfUnits          
Debt Instrument Maturity       10 years              
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in Shares) 0.4us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight   0.5us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight   0.4us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 0.91us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 [1]   $ 1.20us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1   $ 0.91us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 [1] $ 1.33us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1     $ 0.95us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1    
Proceeds from Issuance of Private Placement 9,379,880us-gaap_ProceedsFromIssuanceOfPrivatePlacement 3,503,314us-gaap_ProceedsFromIssuanceOfPrivatePlacement 9,829,014us-gaap_ProceedsFromIssuanceOfPrivatePlacement                
Payments for Commissions 709,839us-gaap_PaymentsForCommissions                    
Deferred Finance Costs, Net   30,210us-gaap_DeferredFinanceCostsNet                  
Issued to Placement Agents and Subagents [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)   72,750us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_IssuedToPlacementAgentsAndSubagentsMember 		                 
Payments for Commissions   145,500us-gaap_PaymentsForCommissions
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_IssuedToPlacementAgentsAndSubagentsMember 		                 
Investment from Non-employee Directors [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Proceeds from Issuance of Private Placement 15,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= mric_InvestmentFromNonemployeeDirectorsMember 		1,100,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= mric_InvestmentFromNonemployeeDirectorsMember 		                 
April 2011 Note [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Debt Instrument, Face Amount             4,289,444us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		      2,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember
Debt Instrument, Interest Rate, Stated Percentage             5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		      10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember
Debt Instrument, Convertible, Conversion Price (in Dollars per share)                     $ 0.60us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember
Accrued Interest Added to Principal Balance of a Note Payable             389,444mric_AccruedInterestAddedToPrincipalBalanceOfANotePayable
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		389,444mric_AccruedInterestAddedToPrincipalBalanceOfANotePayable
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		     
Increase in Principal Balance of Note Payable             1,900,000mric_IncreaseInPrincipalBalanceOfNotePayable
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		1,900,000mric_IncreaseInPrincipalBalanceOfNotePayable
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		     
Debt Instrument, Fair Value Disclosure                   3,745,621us-gaap_DebtInstrumentFairValue
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		 
Other Nonoperating Expense           1,356,177us-gaap_OtherNonoperatingExpense
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		         
Debt Instrument, Unamortized Discount             543,823us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= mric_April2011NoteMember 		       
2014 Junior Secured Notes Payable [Member] | Shareholders' Equity [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Proceeds from Issuance of Debt   413,057us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member
/ us-gaap_ShareholdersEquityClassAxis
= us-gaap_ShareholdersEquityMember 		                 
2014 Junior Secured Notes Payable [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Debt Instrument, Face Amount   3,725,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Debt Instrument, Interest Rate, Stated Percentage   12.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Debt Instrument, Unamortized Discount   413,057us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in Shares)   0.3us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)   1,117,500us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Proceeds from Secured Notes Payable   3,725,000us-gaap_ProceedsFromSecuredNotesPayable
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)   $ 1.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_DebtInstrumentAxis
= mric_JuniorSecuredNotesPayable2014Member 		                 
Debt Instrument, Convertible, Remaining Discount Amortization Period   5 years                  
Placement Agent Warrants [Member] | Other Assets [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Deferred Finance Costs, Net   30,210us-gaap_DeferredFinanceCostsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_NatureOfExpenseAxis
= mric_PlacementAgentWarrantsMember 		                 
Other Offering Expenses [Member] | Other Assets [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Deferred Finance Costs, Net   76,186us-gaap_DeferredFinanceCostsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_NatureOfExpenseAxis
= mric_OtherOfferingExpensesMember 		                 
Officer [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Units Issued During Period (in Shares)       882,726mric_UnitsIssuedDuringPeriod
/ us-gaap_TitleOfIndividualAxis
= us-gaap_OfficerMember 		             
Proceeds from Issuance or Sale of Equity       247,164us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_TitleOfIndividualAxis
= us-gaap_OfficerMember 		             
Director [Member]                      
Note 6 - Notes Payable (Details) [Line Items]                      
Units Issued During Period (in Shares)       567,203mric_UnitsIssuedDuringPeriod
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember 		             
Proceeds from Issuance or Sale of Equity       $ 158,816us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember 		             
[1] This weighted-average exercise price reflects the impact of warrant exercise price adjustments triggered by the December 2014 private placement.