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Revenue Concentration - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue, Major Customer [Line Items]
Total revenue earned	$ 3,882,027	$ 3,161,729	$ 10,415,954	$ 7,872,951
Accounts receivable balances	81,142	2,099,200	81,142	2,099,200
Percentage of vendor comprising of total purchases			10.00%	10.00%
Two customers [Member]
Revenue, Major Customer [Line Items]
Total revenue earned	1,720,637
Three customers [Member]
Revenue, Major Customer [Line Items]
Total revenue earned		2,005,725		3,510,403
Customer One [Member]
Revenue, Major Customer [Line Items]
Total revenue earned			$ 2,606,739
Total revenue, percentage	24.00%	40.00%	25.00%	17.00%
Customer Two [Member]
Revenue, Major Customer [Line Items]
Total revenue, percentage	20.00%	13.00%		15.00%
Customer Three [Member]
Revenue, Major Customer [Line Items]
Total revenue, percentage		10.00%		13.00%
Channel partner [Member]
Revenue, Major Customer [Line Items]
Total revenue, percentage			10.00%
International sales [Member]
Revenue, Major Customer [Line Items]
Total revenue, percentage	2.00%	3.00%	2.00%	4.00%

X

- Definition

Entity wide major customers accounts receivable net.

+ References

No definition available.

+ Details

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Namespace Prefix:	mitk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of vendor comprising of overall purchases.

+ References

No definition available.

+ Details

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Namespace Prefix:	mitk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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X

- Details

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

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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Balance Type:	credit
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