Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net loss attributable to Marketo	$ (18,158)us-gaap_NetIncomeLoss	$ (12,509)us-gaap_NetIncomeLoss
Net loss attributable to redeemable noncontrolling interests	(454)	(11)
Net loss	(18,612)us-gaap_ProfitLoss	(12,520)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,879	2,131
Stock-based compensation expense	9,281us-gaap_ShareBasedCompensation	5,007us-gaap_ShareBasedCompensation
Deferred income taxes	187us-gaap_DeferredIncomeTaxExpenseBenefit	(74)us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in operating assets and liabilities:
Accounts receivable, net	(2,779)	1,709
Prepaid expenses and other current assets	(4,170)	(3,724)
Other assets	(644)	(393)
Accounts payable	1,028	44
Accrued expenses and other current liabilities	(515)	(9,628)
Deferred revenue	4,694	4,251
Other liabilities	116	(14)
Net cash used in operating activities	(8,535)	(13,211)
Cash flows from investing activities:
Increase in Restricted Cash	(215)us-gaap_IncreaseInRestrictedCash
Purchase of property and equipment	(4,092)	(2,579)
Capitalized software development	(521)us-gaap_PaymentsForSoftware	(179)us-gaap_PaymentsForSoftware
Net cash used in investing activities	(4,828)	(2,758)
Cash flows from financing activities:
Proceeds from issuance of common stock upon exercise of stock options	965	2,518
Proceeds from the issuance of common stock issued under the employee stock purchase plan	2,885	3,384
Investment from redeemable non-controlling interests	1,678	1,953
Repurchase of unvested common stock from terminated employees		(23)
Withholding taxes remitted for the net share settlement of an equity awards	(3)	(15)
Repayment of debt	(670)us-gaap_RepaymentsOfDebt	(293)us-gaap_RepaymentsOfDebt
Payment of deferred initial public offering and follow-on offering costs		(104)us-gaap_PaymentsOfStockIssuanceCosts
Payment incurred for common stock registration related to acquisition		(155)
Net cash provided by financing activities	4,855	7,265
Effect of foreign exchange rate changes on cash and cash equivalents	(368)	(23)
Net increase (decrease) in cash and cash equivalents	(8,876)	(8,727)
Cash and cash equivalents - beginning of period	112,644	112,644
Cash and cash equivalents -end of period	103,768	119,572
Supplemental disclosures of cash flow information:
Cash paid for interest	52us-gaap_InterestPaid	75us-gaap_InterestPaid
Cash paid for income taxes	29us-gaap_IncomeTaxesPaidNet	29us-gaap_IncomeTaxesPaidNet
Supplemental disclosure of noncash investing and financing activities:
Vesting of early exercise options	42	115
Property and equipment acquired through tenant improvement allowance	$ 65

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