Component of Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Office and computer equipment	$ 1,552	$ 1,021
Software	856	399
Leasehold improvements	1,357	890
Manufacturing equipment	153	156
Property and equipment, Gross	3,918	2,466
Less accumulated depreciation	(1,924)	(1,325)
Property and equipment, net	$ 1,994	$ 1,141

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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