Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	6 Months Ended
	Sep. 30, 2013 Revolving Credit Facility [Member]	Jun. 30, 2014 Revolving Credit Facility [Member]	Jun. 30, 2014 Computer Equipment [Member]	Dec. 31, 2013 Computer Equipment [Member]	Feb. 28, 2013 Computer Equipment [Member] Installment
Line of Credit Facility [Line Items]
Effective interest rate					6.00%
Number of monthly installments					36
Net book value of equipment under capital lease			$ 1,967	$ 2,495
Remaining principal balance payable			2,070	2,598
Increase in the revolving credit facility	15,000
Percentage of eligible accounts receivable	80.00%
Revolving credit facility, the expiration date	Jul. 31, 2015
Revolving credit facility, amended annual interest rate	0.25%
Unrestricted cash balance exceeds	$ 50,000
Revolving credit facility, Description		In September 2013, the Company entered into an amendment to its existing revolving credit facility pursuant to which Silicon Valley Bank agreed to increase the revolving credit facility to the lesser of $15,000 or 80% of the Company's eligible accounts receivable.