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Intangible Assets (Detail) (USD $)
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Mar. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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|---|---|---|---|
| Intangible Assets | |||
| Less: accumulated amortization | $ (276,615) | $ (261,928) | $ (291,658) |
| Intangible assets, net | 590,458 | 573,731 | 899,480 |
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Licensing agreements
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| Intangible Assets | |||
| Finite-lived intangible assets, gross | 802,994 | 772,230 | 899,231 |
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Patents
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| Intangible Assets | |||
| Finite-lived intangible assets, gross | $ 64,079 | $ 63,429 | $ 291,907 |
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- Definition
Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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