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Long Term Debt/ Note Payable (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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Sep. 30, 2012
Loan And Security Agreement
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Dec. 31, 2011
Loan And Security Agreement
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Mar. 31, 2013
Revenue Interest Purchase Agreement
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Dec. 31, 2012
Revenue Interest Purchase Agreement
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Oct. 05, 2012
Revenue Interest Purchase Agreement
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Dec. 31, 2011
Revenue Interest Purchase Agreement
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| Long-Term Debt / Note payable | |||||||||
| Total debt | $ 21,580,252 | $ 5,000,000 | $ 5,000,000 | $ 5,000,000 | $ 22,438,404 | $ 21,580,252 | $ 20,800,000 | $ 20,800,000 | |
| Less unamortized debt discount | (161,529) | ||||||||
| Less current portion | (434,734) | ||||||||
| Long-term Notes Payable | $ 22,438,404 | $ 21,580,252 | $ 4,403,737 |
| X | ||||||||||
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- Definition
The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying value as of the balance sheet date of the portion of long-term debt not otherwise specified in the taxonomy that is scheduled to be repaid within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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