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Note 6 - Notes Payable (Details Textual) (USD $)
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1 Months Ended | 13 Months Ended | |||
|---|---|---|---|---|---|
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Dec. 31, 2014
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Mar. 31, 2014
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Nov. 30, 2010
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Nov. 30, 2011
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Mar. 31, 2015
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| Long-term Debt | $ 11,014,445us-gaap_LongTermDebt | ||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage | ||||
| Debt Instrument, Unamortized Discount | 2,775,300us-gaap_DebtInstrumentUnamortizedDiscount | 3,226,112us-gaap_DebtInstrumentUnamortizedDiscount | |||
| Debt Instrument, Face Amount | 3,000,000us-gaap_DebtInstrumentFaceAmount | ||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 0.91us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 0.90us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | |||
| Proceeds from Issuance of Private Placement | 9,379,880us-gaap_ProceedsFromIssuanceOfPrivatePlacement | 3,503,314us-gaap_ProceedsFromIssuanceOfPrivatePlacement | |||
| Deferred Finance Costs, Net | 30,210us-gaap_DeferredFinanceCostsNet | ||||
| Units Issued | 10,714,286mric_UnitsIssued | ||||
| Units Share of Common Stock Per Unit | $ 1mric_UnitsSharesOfCommonStockPerUnit | ||||
| Stock Issued During Period, Shares, Conversion of Units | 10,714,286us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits | ||||
| Proceeds from Issuance or Sale of Equity | 3,000,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity | ||||
| Debt Instrument, Term | 10 years | ||||
| Senior Notes [Member] | |||||
| Long-term Debt |
4,289,444us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
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| Debt Instrument, Interest Rate, Stated Percentage |
5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
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| Debt Instrument, Unamortized Discount |
271,305us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
225,353us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
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| 2014 Junior Secured Notes Payable [Member] | Shareholders' Equity [Member] | |||||
| Proceeds from Issuance of Debt |
413,057us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member / us-gaap_ShareholdersEquityClassAxis = us-gaap_ShareholdersEquityMember |
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| 2014 Junior Secured Notes Payable [Member] | |||||
| Debt Instrument, Interest Rate, Stated Percentage |
12.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Debt Instrument, Unamortized Discount |
413,057us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right |
0.3us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Debt Instrument, Face Amount |
3,725,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
1,117,500us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Proceeds from Secured Notes Payable |
3,725,000us-gaap_ProceedsFromSecuredNotesPayable / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
$ 1.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_DebtInstrumentAxis = mric_JuniorSecuredNotesPayable2014Member |
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| Debt Instrument, Convertible, Remaining Discount Amortization Period | 5 years | ||||
| Investment from Nonemployee Directors [Member] | |||||
| Proceeds from Issuance of Private Placement |
1,100,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement / us-gaap_StatementEquityComponentsAxis = mric_InvestmentFromNonemployeeDirectorsMember |
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| Issued to Placement Agents and Subagents [Member] | |||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
72,750us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = mric_IssuedToPlacementAgentsAndSubagentsMember |
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| Payments for Commissions |
145,500us-gaap_PaymentsForCommissions / us-gaap_ClassOfWarrantOrRightAxis = mric_IssuedToPlacementAgentsAndSubagentsMember |
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| Other Assets [Member] | Placement Agent Warrants [Member] | |||||
| Deferred Finance Costs, Net |
30,210us-gaap_DeferredFinanceCostsNet / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_NatureOfExpenseAxis = mric_PlacementAgentWarrantsMember |
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| Other Assets [Member] | Other Offering Expenses [Member] | |||||
| Deferred Finance Costs, Net |
76,186us-gaap_DeferredFinanceCostsNet / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_NatureOfExpenseAxis = mric_OtherOfferingExpensesMember |
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| Officer [Member] | |||||
| Units Issued |
882,726mric_UnitsIssued / us-gaap_TitleOfIndividualAxis = us-gaap_OfficerMember |
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| Proceeds from Issuance or Sale of Equity |
247,164us-gaap_ProceedsFromIssuanceOrSaleOfEquity / us-gaap_TitleOfIndividualAxis = us-gaap_OfficerMember |
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| Director [Member] | |||||
| Units Issued |
567,203mric_UnitsIssued / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |
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| Proceeds from Issuance or Sale of Equity |
$ 158,816us-gaap_ProceedsFromIssuanceOrSaleOfEquity / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |
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| X | ||||||||||
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- Definition
Equity units issued during period. No definition available.
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| X | ||||||||||
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- Definition
Shares of common stock per equity unit issued. No definition available.
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| X | ||||||||||
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- Definition
Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. No definition available.
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| X | ||||||||||
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- Definition
Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
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- Definition
The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of cash paid for commissions during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. No definition available.
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| X | ||||||||||
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- Definition
The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash inflow from borrowings supported by a written promise to pay an obligation that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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