Business Combination - Additional Information (Detail) (Mainstreet Commerce LC [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	2 Months Ended	3 Months Ended
	Jan. 22, 2014	Mar. 31, 2014	Mar. 31, 2014
Business Acquisition [Line Items]
Acquisition date			Jan. 22, 2014
Percentage of equity acquired	100.00%
Business acquisition, cash consideration	$ 19.4
Amount held in escrow	10.0
Amount in escrow is reserved for payments to employees for post combination employment services	7.0
Business acquisition, escrow withheld as protection against certain losses	3.0
Purchase price of business acquisition	12.4
Transaction costs in connection with acquisition		$ 0.5	$ 0.1
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets, amortization period			2 years
Trademarks [Member]
Business Acquisition [Line Items]
Intangible assets, amortization period			1 year
Developed Technology [Member]
Business Acquisition [Line Items]
Intangible assets, amortization period			5 years