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Property and Equipment, net (Details) (USD $)
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Dec. 31, 2012
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Dec. 31, 2011
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| Summary of property and equipment, net | ||
| Property and equipment, gross | $ 1,537,740 | $ 1,526,646 |
| Accumulated depreciation and amortization | (1,453,149) | (1,377,960) |
| Property and equipment, net | 84,591 | 148,686 |
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Furniture and fixtures [Member]
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| Summary of property and equipment, net | ||
| Property and equipment, gross | 20,742 | 20,742 |
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Laboratory equipment [Member]
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| Summary of property and equipment, net | ||
| Property and equipment, gross | 757,882 | 757,882 |
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Leasehold improvements [Member]
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| Summary of property and equipment, net | ||
| Property and equipment, gross | 487,871 | 476,777 |
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Office and computer equipment [Member]
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| Summary of property and equipment, net | ||
| Property and equipment, gross | $ 271,245 | $ 271,245 |
| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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