Fixed Assets, Net (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Fixed assets	$ 813,000	$ 1,819,000
Less: accumulated depreciation and amortization	(664,000)	(1,508,000)
Fixed assets, net	148,838	311,366
Laboratory equipment [Member]
Fixed assets	0	1,046,000
Property, Plant and Equipment, Useful Life	5 years
Office equipment [Member]
Fixed assets	357,000	318,000
Property, Plant and Equipment, Useful Life	3 years
Leasehold improvements [Member]
Fixed assets	178,000	178,000
Property, Plant and Equipment, Estimated Useful Lives	Over life of lease
Furniture and fixtures under capitalized lease [Member]
Fixed assets	157,000	157,000
Furniture and fixtures [Member]
Fixed assets	$ 121,000	$ 120,000
Property, Plant and Equipment, Useful Life	7 years

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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