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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	Dec. 31, 2024 institution
Accounting Policies [Abstract]
Number of financial services organizations, leading marketplace and financial technology brands (more than)	7,900

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- Definition

Number of financial institutions that signed agreement to deploy mobile deposit.

+ References

No definition available.

+ Details

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Namespace Prefix:	mitk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration