Annual report pursuant to Section 13 and 15(d)

Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement

v2.4.1.9
Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement
 1 Months Ended 12 Months Ended
Jan. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Private Placements [Member] | Monte Carlo Simulation Valuation Method [Member] | Derivative Financial Instruments, Liabilities [Member] | Minimum [Member]      
Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]      
Expected volatility 47.10%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		39.30%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		40.40%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember
Risk free interest rates   0.67%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		1.01%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember
Expected remaining term (in years)   2 years 186 days 3 years 186 days
Private Placements [Member] | Monte Carlo Simulation Valuation Method [Member] | Derivative Financial Instruments, Liabilities [Member] | Maximum [Member]      
Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]      
Expected volatility 100.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		100.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		100.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember
Risk free interest rates   1.12%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		1.27%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember
Expected remaining term (in years)   3 years 25 days 4 years 25 days
Private Placements [Member] | Monte Carlo Simulation Valuation Method [Member] | Derivative Financial Instruments, Liabilities [Member]      
Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]      
Dividend yield 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember
Risk free interest rates 0.91%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		   
Expected remaining term (in years) 5 years    
Minimum [Member]      
Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]      
Expected volatility   49.40%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		43.40%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Risk free interest rates   1.73%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		0.92%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Expected remaining term (in years)   5 years 6 months 5 years
Maximum [Member]      
Note 7 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]      
Expected volatility   51.80%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		46.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Risk free interest rates   2.71%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		2.10%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Expected remaining term (in years)   6 years 6 years