Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property and equipment, net
Total property and equipment, at cost	$ 8,128	$ 8,400
Less: Accumulated depreciation	(7,335)	(7,042)
Property and equipment, net	793	1,358	2,276
Depreciation expense	928	1,298	1,507
Equipment
Property and equipment, net
Total property and equipment, at cost	4,868	5,151
Furniture and fixtures
Property and equipment, net
Total property and equipment, at cost	227	227
Leasehold improvements
Property and equipment, net
Total property and equipment, at cost	2,652	2,641
Software
Property and equipment, net
Total property and equipment, at cost	381	381
Capitalized leased equipment
Property and equipment, net
Total property and equipment, at cost	$ 0	$ 0

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