Represents the information pertaining to adjustment to redeemable non controlling interests.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- 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
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Data Type:	num:percentItemType
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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
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Data Type:	num:percentItemType
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- 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

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of contribution by non-controlling interests.

+ References

No definition available.

+ Details

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Namespace Prefix:	mkto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Represents the amount of impact of foreign currency exchange related to non-controlling interests.

+ References

No definition available.

+ Details

Name:	mkto_RedeemableNoncontrollingInterestForeignCurrencyTranslationAdjustments
Namespace Prefix:	mkto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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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

Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

+ 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 210.5-03.19)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- 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

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

Reference 2: 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph (12)(c)
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-Name Accounting Standards Codification
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-Publisher FASB
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-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph 14
-URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Details

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- Details

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Joint Venture (Details) $ in Thousands			1 Months Ended		12 Months Ended
Joint Venture (Details) $ in Thousands	Feb. 19, 2014 JPY (¥)	Feb. 19, 2014 USD ($)	Mar. 31, 2015 JPY (¥)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Joint Venture
Amount contributed by investors to acquire equity interests					$ 1,678	$ 1,953
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
Balance					$ 800
Increase due to investment by redeemable non-controlling interests					1,445	1,585
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest					(1,645)	(618)
Redeemable Noncontrolling Interest Foreign Currency Translation Adjustments					(20)	(167)
Adjustment to redeemable non-controlling interests					4,063
Balance					$ 4,643	$ 800
Marketo KK \| Vesting milestones
Joint Venture
Equity interests held by company (as a percent)			60.10%	60.10%
Contributions to subscribe to additional shares			¥ 237,480,955	$ 2,000
Investors
Joint Venture
Amount contributed by investors to acquire equity interests	¥ 200,000,000	$ 2,000
Percentage of equity interest held by investors	35.40%	35.40%
Investors \| Vesting milestones
Joint Venture
Contributions to subscribe to additional shares			¥ 200,000,000	$ 1,700
Percentage of equity interest held by investors			39.90%	39.90%