Property And Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,174	$ 3,211
Accumulated depreciation and amortization	(2,944)	(2,784)
Property and equipment, net	230	427
Laboratory equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,453	1,508
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	435	421
Leasehold improvements, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,286	$ 1,282

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.

+ References+ Details

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.

+ References+ Details

- 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.

+ References+ Details