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Accrued Liabilities and Other - Comprised Balance of Accrued Liabilities and Other (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accrued professional fees	$ 4,523	$ 2,527
Deferred rent	865	834
Other employee related	536	374
ESPP contributions	339	892
Obligations under capital lease	191	270
Accrued other	5,430	4,612
Total accrued liabilities and other balance	$ 11,884	$ 9,509

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

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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