Other Financial Statement Information (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property and equipment
Total property and equipment	$ 2,615	$ 2,612
Less: accumulated depreciation and amortization	(2,243)	(2,197)
Property and equipment, net	372	415
Leased equipment
Property and equipment
Total property and equipment	89	89
Equipment
Property and equipment
Total property and equipment	1,202	1,192
Leasehold improvements
Property and equipment
Total property and equipment	381	381
Demonstration Equipment
Property and equipment
Total property and equipment	5	5
Purchased software
Property and equipment
Total property and equipment	368	373
Furniture and fixtures
Property and equipment
Total property and equipment	$ 570	$ 572

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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