Leasehold Improvements and Equipment (Details) (USD $)	Sep. 27, 2014	Dec. 31, 2013
Leasehold improvements
Laboratory equipment	$ 3,028,644	$ 2,782,364
Leasehold improvements	495,240	491,125
Computer equipment	329,737	372,851
Furniture and fixtures	13,039	18,313
Office equipment	7,877	7,877
Construction in progress	159,277	40,126
Leasehold improvements, gross	4,033,814	3,712,656
Less accumulated depreciation	2,740,112	2,649,417
Leasehold improvements, total	$ 1,293,702	$ 1,063,239

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

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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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.

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