PROPERTY AND EQUIPMENT, NET (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property and equipment
Property and equipment, gross	$ 15,501	$ 15,519
Less accumulated depreciation	(10,100)	(10,290)
Property and equipment, net	5,401	5,229
Depreciation and amortization	2,315	2,522	2,396
Leasehold improvements
Property and equipment
Property and equipment, gross	781	796
Medical equipment
Property and equipment
Property and equipment, gross	641	537
Computer equipment
Property and equipment
Property and equipment, gross	8,060	7,968
Internally developed software
Property and equipment
Property and equipment, gross	2,689	3,130
Office and other equipment
Property and equipment
Property and equipment, gross	$ 3,330	$ 3,088

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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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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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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