Property, Plant and Equipment (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]
Laboratory Equipment, Gross	$ 2,305,410	$ 2,578,662
Leasehold Improvements, Gross	2,817,123	3,187,415
Computer Equipment, Gross	458,421	375,195
Furniture and Fixtures, Gross	345,287	332,427
Property, Plant and Equipment, Gross	5,926,241	6,473,699
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(4,938,372)	(5,654,707)
Property, Plant and Equipment, Net	$ 987,869	$ 818,992

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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