Joint Venture (Details)	3 Months Ended			1 Months Ended				3 Months Ended	1 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2015 Marketo KK USD ($)	Mar. 31, 2015 Marketo KK Vesting milestones USD ($)	Mar. 31, 2015 Marketo KK Vesting milestones JPY (¥)	Feb. 28, 2014 Investors USD ($)	Feb. 28, 2014 Investors JPY (¥)	Mar. 31, 2015 Investors	Mar. 31, 2015 Investors Vesting milestones USD ($)	Mar. 31, 2015 Investors Vesting milestones JPY (¥)
Joint Venture
Amount contributed by investors to acquire equity interests	$ 1,678,000	$ 1,953,000				$ 2,000,000	¥ 200,000,000
Equity interests held by company (as a percent)				60.10%	60.10%
Contributions to subscribe to additional shares				2,000,000	237,480,955				1,700,000	200,000,000
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			1,100,000
Increase due to investment by redeemable non-controlling interests	$ 1,445,000