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Commitments and Contingencies - Additional Information (Detail) (USD $)
Mar. 31, 2015
Loss Contingencies [Line Items]  
Annual base rent $ 471,000mitk_AnnualBaseRent
Increased percentage of Company's annual base rent 3.00%us-gaap_OperatingLeasesOfLesseeContingentRentalsBasisSpreadOnVariableRate
Tenant improvement allowances 675,690mitk_TenantImprovementAllowances
Unamortized lease incentives 445,845mitk_UnamortizedLeaseIncentives
Building [Member]  
Loss Contingencies [Line Items]  
Amended office space subject to the lease 22,523us-gaap_AreaOfLand
/ us-gaap_MajorPropertyClassAxis
= us-gaap_BuildingMember
Other current liabilities [Member]  
Loss Contingencies [Line Items]  
Unamortized lease incentives 104,905mitk_UnamortizedLeaseIncentives
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
Other non-current liabilities [Member]  
Loss Contingencies [Line Items]  
Unamortized lease incentives 340,940mitk_UnamortizedLeaseIncentives
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
Standby letter of credit [Member]  
Loss Contingencies [Line Items]  
Standby letter of credit to the landlord $ 210,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember