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Note 1 - Description of the Business and Liquidity (Details) (USD $)
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1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
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Mar. 31, 2014
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Jan. 31, 2013
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Jul. 31, 2012
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Feb. 29, 2012
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Nov. 30, 2010
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Note 1 - Description of the Business and Liquidity (Details) [Line Items] |
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| Net Income (Loss) Attributable to Parent |
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$ (3,647,222)us-gaap_NetIncomeLoss
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$ (3,194,812)us-gaap_NetIncomeLoss
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$ (2,609,920)us-gaap_NetIncomeLoss
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$ (5,370,492)us-gaap_NetIncomeLoss
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$ (7,086,274)us-gaap_NetIncomeLoss
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$ (5,877,718)us-gaap_NetIncomeLoss
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| Retained Earnings (Accumulated Deficit) |
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(75,362,522)us-gaap_RetainedEarningsAccumulatedDeficit
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(75,362,522)us-gaap_RetainedEarningsAccumulatedDeficit
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(72,752,602)us-gaap_RetainedEarningsAccumulatedDeficit
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(65,666,328)us-gaap_RetainedEarningsAccumulatedDeficit
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| Net Cash Provided by (Used in) Operating Activities |
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(5,256,287)us-gaap_NetCashProvidedByUsedInOperatingActivities
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(6,263,800)us-gaap_NetCashProvidedByUsedInOperatingActivities
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(7,777,931)us-gaap_NetCashProvidedByUsedInOperatingActivities
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(7,433,816)us-gaap_NetCashProvidedByUsedInOperatingActivities
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| Proceeds from Issuance of Private Placement |
3,503,314us-gaap_ProceedsFromIssuanceOfPrivatePlacement
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9,829,014us-gaap_ProceedsFromIssuanceOfPrivatePlacement
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5,516,495us-gaap_ProceedsFromIssuanceOfPrivatePlacement
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9,829,014us-gaap_ProceedsFromIssuanceOfPrivatePlacement
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5,516,495us-gaap_ProceedsFromIssuanceOfPrivatePlacement
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| Development Stage Entities, Stock Issued, Value, Issued for Cash |
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4,946,560us-gaap_StockIssuedDuringPeriodValueIssuedForCash
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| Proceeds from Issuance or Sale of Equity |
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3,000,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
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| Cash and Cash Equivalents, at Carrying Value |
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1,894,681us-gaap_CashAndCashEquivalentsAtCarryingValue
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5,031,199us-gaap_CashAndCashEquivalentsAtCarryingValue
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1,894,681us-gaap_CashAndCashEquivalentsAtCarryingValue
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5,031,199us-gaap_CashAndCashEquivalentsAtCarryingValue
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3,516,244us-gaap_CashAndCashEquivalentsAtCarryingValue
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1,620,005us-gaap_CashAndCashEquivalentsAtCarryingValue
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145,478us-gaap_CashAndCashEquivalentsAtCarryingValue
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| Boston Scientific Notes [Member] |
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| Note 1 - Description of the Business and Liquidity (Details) [Line Items] |
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| Notes Payable Cancelled, Principal Amount |
4,338,601mric_NotesPayableCancelledPrincipalAmount
/ us-gaap_RelatedPartyTransactionAxis
= mric_BostonScientificNotesMember
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| Unit Offering Completed in February 2012 [Member] |
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| Note 1 - Description of the Business and Liquidity (Details) [Line Items] |
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| Proceeds from Issuance or Sale of Equity |
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3,424,950us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_StatementEquityComponentsAxis
= mric_UnitOfferingCompletedInFebruary2012Member
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1,521,610us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_StatementEquityComponentsAxis
= mric_UnitOfferingCompletedInFebruary2012Member
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| Subsequent Event [Member] | Boston Scientific Notes [Member] |
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| Note 1 - Description of the Business and Liquidity (Details) [Line Items] |
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| Notes Payable Cancelled, Principal Amount |
4,338,601mric_NotesPayableCancelledPrincipalAmount
/ us-gaap_DebtInstrumentAxis
= mric_BostonScientificNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| Subsequent Event [Member] |
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| Note 1 - Description of the Business and Liquidity (Details) [Line Items] |
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| Proceeds from Issuance of Private Placement |
$ 3,400,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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