Joint Venture (Details)	1 Months Ended				3 Months Ended		9 Months Ended
	Mar. 31, 2015 JPY (¥)	Mar. 31, 2015 USD ($)	Feb. 28, 2014 JPY (¥)	Feb. 28, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Joint Venture
Amount contributed by investors to acquire equity interests							$ 1,678,000	$ 1,953,000
Redeemable non-controlling interests
Increase due to investment by redeemable non-controlling interests							1,445,000
Net loss attributable to redeemable non-controlling interest (excluding adjustment to redeemable non-controlling interest)					$ 367,000	$ 206,000	1,236,000	376,000
Adjustment to redeemable non-controlling interest					(1,630,000)		(2,542,000)
Net loss and adjustment attributable to redeemable non-controlling interests					$ (1,263,000)	$ 206,000	(1,306,000)	$ 376,000
Marketo KK
Redeemable non-controlling interests
Adjustment to redeemable non-controlling interest							$ 1,600,000
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	$ 2,000,000
Investors
Joint Venture
Amount contributed by investors to acquire equity interests			¥ 200,000,000	$ 2,000,000
Percentage of equity interest held by investors			35.40%	35.40%
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%
Investors | Vesting milestones
Joint Venture
Contributions to subscribe to additional shares	¥ 200,000,000	$ 1,700,000
Percentage of equity interest held by investors					39.90%		39.90%