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Note 7 - Stockholders' Equity (Details) - Common Stock Warrants (USD $)
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1 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2014
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Jan. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Common Stock Warrants [Abstract] | |||||||||
| Outstanding, Shares | 20,759,136us-gaap_ClassOfWarrantOrRightOutstanding | 20,759,136us-gaap_ClassOfWarrantOrRightOutstanding | 12,136,865us-gaap_ClassOfWarrantOrRightOutstanding | 8,763,836us-gaap_ClassOfWarrantOrRightOutstanding | |||||
| Outstanding at January 1, 2012, Weighted-Average Exercise Price (in Dollars per share) | $ 0.91us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | [1] | $ 1.20us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 0.91us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | [1] | $ 1.33us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 0.95us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | ||
| Expired | (41,666)mric_WarrantsExpiredDuringPeriod | ||||||||
| Expired (in Dollars per share) | $ 1.00mric_WarrantsExpiredDuringPeriodWeightedAvergageExercisePrice | ||||||||
| Issued, Shares | 6,325,125mric_WarrantsIssuedDuringPeriod | 4,600,842mric_WarrantsIssuedDuringPeriod | 8,622,271mric_WarrantsIssuedDuringPeriod | 4,643,842mric_WarrantsIssuedDuringPeriod | |||||
| Issued, Weighted-Average Exercise Price (in Dollars per share) | $ 0.858mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice | $ 1.75mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice | $ 0.98mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice | $ 1.75mric_WarrantsIssuedDuringPeriodWeightedAverageExercisePrice | |||||
| Shares withheld on net settled exercises | (101,318)mric_WarrantsWithheldOnNetSettledExercisesDuringPeriod | ||||||||
| Shares withheld on net settled exercises (in Dollars per share) | $ 0.85mric_WarrantsSharesWithheldOnNetSettledExercisesDuringPeriodWeightedAvergageExercisePrice | ||||||||
| Exercised | (1,127,829)mric_WarrantsExercisedDuringPeriod | ||||||||
| Exercised (in Dollars per share) | $ 0.08mric_WarrantsExercisedDuringPeriodWeightedAverageExercisePrice | ||||||||
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|||||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of warrants exercised during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Weighted average exercise price of warrants exercised during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Number of warrants expired during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Weighted average exercise price of warrants expired during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Number of warrants issued during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Weighted average exercise price of warrants issued during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Weighted average exercise price of shares withheld on net settled exercises during the reporting period. No definition available.
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| X | ||||||||||
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- Definition
Number of warrants withheld on net settled exercises during period. 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 warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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