Annual report pursuant to Section 13 and 15(d)

Note 7 - Stockholders' Equity (Details)

v2.4.1.9
Note 7 - Stockholders' Equity (Details) (USD $)
 1 Months Ended 12 Months Ended
Dec. 31, 2014
Mar. 31, 2014
Jan. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2013
Note 7 - Stockholders' Equity (Details) [Line Items]              
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  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right 0.4us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight   0.5us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight 0.4us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight      
Stock Issued During Period, Shares, New Issues 15,812,808us-gaap_StockIssuedDuringPeriodSharesNewIssues   9,201,684us-gaap_StockIssuedDuringPeriodSharesNewIssues        
Warrants Issued During Period 6,325,125mric_WarrantsIssuedDuringPeriod   4,600,842mric_WarrantsIssuedDuringPeriod 8,622,271mric_WarrantsIssuedDuringPeriod 4,643,842mric_WarrantsIssuedDuringPeriod    
Gross Proceeds from Issuance of Private Placement (in Dollars) $ 10,175,550mric_GrossProceedsFromIssuanceOfPrivatePlacement   $ 11,042,021mric_GrossProceedsFromIssuanceOfPrivatePlacement        
Proceeds from Issuance of Private Placement (in Dollars) 9,379,880us-gaap_ProceedsFromIssuanceOfPrivatePlacement 3,503,314us-gaap_ProceedsFromIssuanceOfPrivatePlacement 9,829,014us-gaap_ProceedsFromIssuanceOfPrivatePlacement        
Payments for Commissions (in Dollars) 709,839us-gaap_PaymentsForCommissions            
Payments of Stock Issuance Costs (in Dollars) 85,831us-gaap_PaymentsOfStockIssuanceCosts   1,104,202us-gaap_PaymentsOfStockIssuanceCosts        
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants (in Dollars) 1,106,896us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants            
Term of Warrants 5 years   5 years        
Warrants Issued During Period, Weighted Average Exercise Price (in Dollars per share) $ 0.858mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice   $ 1.75mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice $ 0.98mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice $ 1.75mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice    
Underlying Shares with Derivative Restriction Agreements 9,141,250mric_UnderlyingSharesWithDerivativeRestrictionAgreements            
Percentage of Volatility Obtained from HVT Function on Bloomberg     100.00%mric_PercentageOfVolatilityObtainedFromHVTFunctionOnBloomberg        
Risk free Interest Rate Term     24.00%mric_RiskfreeInterestRateTerm        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 10,343,309us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber     10,343,309us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 7,430,225us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 6,432,127us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       3,284,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross [2] 1,219,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross [2]    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)       $ 1.09us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice [2] $ 1.43us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice [2]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)       $ 0.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 0.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) 2,045,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized     2,045,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition       2 years 109 days      
Warrants from 2014 Private Placement [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 0.6435us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_WarrantsFrom2014PrivatePlacementMember 		    $ 0.6435us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_WarrantsFrom2014PrivatePlacementMember 		     
Issued to Sub Placement Agents [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Warrants Issued During Period     133,024mric_WarrantsIssuedDuringPeriod
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_IssuedToSubPlacementAgentsMember 		       
Jan 2013 Financing Transaction [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Warrants Issued During Period, Weighted Average Exercise Price (in Dollars per share)       $ 0.64mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_Jan2013FinancingTransactionMember 		     
Service Provider [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Term of Warrants       5 years      
Investment from Non-employee Directors [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Proceeds from Issuance of Private Placement (in Dollars) 15,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= mric_InvestmentFromNonemployeeDirectorsMember 		1,100,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= mric_InvestmentFromNonemployeeDirectorsMember 		         
Issued to Two Non Employee Directors [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Proceeds from Issuance of Private Placement (in Dollars)     $ 402,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_StatementEquityComponentsAxis
= mric_IssuedToTwoNonEmployeeDirectorsMember 		       
Exercise Price of 1.75 [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross         200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= mric_ExercisePriceOf1.75Member 		   
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)         $ 1.75us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= mric_ExercisePriceOf1.75Member 		   
The 2013 Plan [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized             1,250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= mric_The2013PlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 1,038,167us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= mric_The2013PlanMember 		    1,038,167us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= mric_The2013PlanMember 		     
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 211,833us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mric_The2013PlanMember 		    211,833us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mric_The2013PlanMember 		     
The Director Plan [Member]              
Note 7 - Stockholders' Equity (Details) [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         570,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= mric_TheDirectorPlanMember 		   
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 275,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mric_TheDirectorPlanMember 		    275,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mric_TheDirectorPlanMember 		     
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period       295,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_PlanNameAxis
= mric_TheDirectorPlanMember 		     
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)         $ 0.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= mric_TheDirectorPlanMember 		   
[1] This weighted-average exercise price reflects the impact of warrant exercise price adjustments triggered by the December 2014 private placement.
[2] All options granted during the years ended December 31, 2013 and 2014 were granted with exercise prices which were deemed to be equal to the fair market value of the Company's stock on the date of grant, except for 200,000 options granted in December 2013 that have an exercise price of $1.75, which was deemed to be above fair market value on the date of grant.