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

Note 8 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement

v2.4.1.9
Note 8 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement
 1 Months Ended 12 Months Ended
Jan. 31, 2013
Jul. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Note 8 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]        
Expected volatility   47.64%us-gaap_FairValueAssumptionsExpectedVolatilityRate 46.49%us-gaap_FairValueAssumptionsExpectedVolatilityRate 47.08%us-gaap_FairValueAssumptionsExpectedVolatilityRate
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] | Derivative Financial Instruments, Liabilities [Member]        
Note 8 - 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 		0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember 		0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember 		0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_ClassOfWarrantOrRightAxis
= mric_PrivatePlacementsMember
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Minimum [Member]        
Note 8 - Stockholders' Equity (Details) - Assumptions Used in Calculating Fair Value of Warrants Issued, Private Placement [Line Items]        
Expected volatility 47.08%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		  40.38%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember 		40.96%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ 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 8 - 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_RangeAxis
= us-gaap_MaximumMember 		  100.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		46.88%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ 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