General form of registration statement for all companies including face-amount certificate companies

Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement

v2.4.1.9
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement
 1 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2013
Jul. 31, 2012
Sep. 30, 2014
Dec. 31, 2013
Dec. 31, 2012
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]          
Dividend yield     0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Risk free interest rates 0.91%us-gaap_FairValueAssumptionsRiskFreeInterestRate 0.75%us-gaap_FairValueAssumptionsRiskFreeInterestRate   1.38%us-gaap_FairValueAssumptionsRiskFreeInterestRate 0.65%us-gaap_FairValueAssumptionsRiskFreeInterestRate
Expected remaining term (in years) 5 years 5 years   5 years 4 years 186 days
Private Placements [Member] | Monte Carlo Simulation Valuation Method [Member] | Minimum [Member]          
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]          
Expected volatility     38.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		   
Risk free interest rates     0.76%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		   
Expected remaining term (in years)     2 years 277 days    
Private Placements [Member] | Monte Carlo Simulation Valuation Method [Member] | Maximum [Member]          
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]          
Expected volatility     100.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		   
Risk free interest rates     1.18%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		   
Expected remaining term (in years)     3 years 116 days    
Private Placements [Member] | Monte Carlo Simulation Valuation Method [Member]          
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]          
Dividend yield     0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_ValuationTechniqueAxis
= mric_MonteCarloSimulationValuationMethodMember 		   
Minimum [Member]          
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]          
Expected volatility     49.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		43.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		45.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Risk free interest rates       1.01%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		0.19%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Expected remaining term (in years)       3 years 186 days 1 year 219 days
Maximum [Member]          
Note 6 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]          
Expected volatility     51.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		46.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		45.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Risk free interest rates       1.27%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		0.77%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Expected remaining term (in years)       4 years 25 days 5 years