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Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts Payable and Accrued Liabilities [Line Items]
Payroll and payroll-related expenses	$ 2,112	$ 2,065
Sales and marketing accruals	4,138
All other	3,344	3,159
Accrued expenses and other current liabilities	$ 9,594	$ 5,224

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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