Represents estimated redemption value of call/put option embedded in redeemable non-controlling interests.

No definition available.

Name:	mkto_EstimatedRedemptionValueOfCallPutOptionEmbeddedInRedeemableNoncontrollingInterests
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the percentage of the common stock held by the Investors that may be callable or puttable beginning on the eighth anniversary of the initial capital contribution by the Investors.

+ References

No definition available.

+ Details

Name:	mkto_PercentageOfCommonStockNoncontrollingOwnersCallablePuttableBeginningOnEighthAnniversary
Namespace Prefix:	mkto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of the common stock held by the Investors that may be callable or puttable beginning on the seventh anniversary of the initial capital contribution by the Investors.

+ References

No definition available.

+ Details

Name:	mkto_PercentageOfCommonStockNoncontrollingOwnersCallablePuttableBeginningOnSeventhAnniversary
Namespace Prefix:	mkto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of the common stock held by the Investors that may be callable or puttable beginning on the tenth anniversary of the initial capital contribution by the Investors.

+ References

No definition available.

+ Details

Name:	mkto_PercentageOfCommonStockNoncontrollingOwnersCallablePuttableBeginningOnTenthAnniversary
Namespace Prefix:	mkto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	mkto_RedeemableNoncontrollingInterestEquityRollForward
Namespace Prefix:	mkto_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the purchase of noncontrolling interest during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_ProceedsFromMinorityShareholders
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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Joint Venture (Details)	6 Months Ended		0 Months Ended				6 Months Ended	0 Months Ended
Joint Venture (Details)	Jun. 30, 2014 USD ($)	Jun. 30, 2014 Marketo KK USD ($)	Apr. 01, 2015 Marketo KK Forecast USD ($)	Apr. 01, 2015 Marketo KK Forecast JPY (¥)	Feb. 19, 2014 Investors USD ($)	Feb. 19, 2014 Investors JPY (¥)	Jun. 30, 2014 Investors	Apr. 01, 2015 Investors Forecast USD ($)	Apr. 01, 2015 Investors Forecast JPY (¥)
Joint Venture
Amount contributed by investors to acquire equity interests	$ 1,953,000				$ 2,000,000	¥ 200,000,000		$ 2,000,000	¥ 200,000,000
Equity interests held by company (as a percent)		64.60%	60.10%	60.10%
Contributions to subscribe to additional shares			2,300,000	237,480,955
Percentage of equity interest held by investors					35.40%	35.40%		39.90%	39.90%
Percentage of the common stock callable or puttable beginning on the seventh anniversary							20.00%
Percentage of the common stock callable or puttable beginning on the eighth anniversary							40.00%
Percentage of the common stock callable or puttable beginning on the tenth anniversary							100.00%
Redeemable non-controlling interests
Estimated redemption value of call/put option embedded in redeemable non-controlling interests		$ 200,000