Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 05, 2012	Dec. 31, 2011	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Computer Software, Intangible Asset [Member] Maximum [Member]	Dec. 31, 2013 Computer Software, Intangible Asset [Member] Minimum [Member]	Dec. 31, 2012 Common Stock
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue recognized period	12 months
Original maturities of cash and cash equivalents	Three months or less
Property and Equipment useful lives							5 years	3 years
Current portion of deferred rent recognized period	12 months
Intangible Assets Useful Life					6 years	18 months
Preferred Stock, Shares Outstanding	0	0	10,462,877
Conversion of preferred stock to common stock upon initial public offering (in shares)									83,703,016
Stock options vesting period	4 years
Allowance for Doubtful Accounts Receivable	$ 1,143	$ 742		$ 0
Valuation Allowances and Reserves, Balance	$ 648	$ 1,196		$ 250