Property and Equipment Net (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Office equipment	$ 3,078	$ 3,071
Office equipment-capital leases	231	231
Leasehold improvements	3,015	3,015
Property and equipment, Gross	6,324	6,317
Accumulated depreciation and amortization	(4,408)	(4,267)
Total	$ 1,916	$ 2,050

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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Property, plant, or equipment held under lease agreements classified as an asset.

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- Definition

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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