Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount before accumulated depreciation, depletion and amortization of 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, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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PROPERTY AND EQUIPMENT, NET (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property and equipment
Property and equipment, gross	$ 20,669us-gaap_PropertyPlantAndEquipmentGross	$ 24,575us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation	(15,094)	(16,455)
Property, Plant and Equipment, Net, Total	5,575us-gaap_PropertyPlantAndEquipmentNet	8,120us-gaap_PropertyPlantAndEquipmentNet
Depreciation and amortization	3,850us-gaap_DepreciationAndAmortization	2,594us-gaap_DepreciationAndAmortization	2,315us-gaap_DepreciationAndAmortization
Leasehold improvements
Property and equipment
Property and equipment, gross	1,367	1,448
Medical equipment
Property and equipment
Property and equipment, gross	937	1,671
Computer equipment
Property and equipment
Property and equipment, gross	9,607	14,594
Software development
Property and equipment
Property and equipment, gross	3,807	1,404
Office and other equipment
Property and equipment
Property and equipment, gross	4,502	5,071
Vehicles
Property and equipment
Property and equipment, gross	$ 449	$ 387