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Notes Payable (Narrative) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 1 Months Ended | 0 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
General Electric Capital Corporation [Member]
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Jun. 24, 2013
Hercules Technology II, L.P. Notes [Member]
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Jun. 25, 2013
Hercules Technology II, L.P. Notes [Member]
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Jun. 30, 2013
Hercules Technology II, L.P. Notes [Member]
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Jun. 30, 2013
Platinum Montaur Life Sciences, LLC Credit Facility [Member]
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Jun. 30, 2013
Series X Warrants and Series AA Warrants [Member]
Platinum Montaur Life Sciences, LLC Credit Facility [Member]
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Jun. 30, 2013
Series HH Warrants [Member]
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Jun. 30, 2013
Series HH Warrants [Member]
General Electric Capital Corporation [Member]
item
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Jun. 30, 2013
Preferred Stock [Member]
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Jun. 30, 2013
Common Stock [Member]
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Jun. 30, 2013
Maximum [Member]
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Jun. 30, 2013
Maximum [Member]
Platinum Montaur Life Sciences, LLC Credit Facility [Member]
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| Debt Instrument [Line Items] | ||||||||||||||||
| Debt instrument, principal amount | $ 25,000,000 | $ 4,781,333 | $ 35,000,000 | |||||||||||||
| Debt instrument, interest rate | 9.83% | 10.00% | ||||||||||||||
| Number of shares underlying warrant issued | 7,733,223 | 301,205 | ||||||||||||||
| Exercise price of warrant issued | 2.49 | 2.49 | 3.04 | |||||||||||||
| Percentage of original principal amount of loan to be paid as a fee | 4.00% | |||||||||||||||
| Principal payments on notes payable | 5,901,335 | 1,300,000 | 4,400,000 | 4,781,333 | ||||||||||||
| Number of installment payments on notes payable | 30 | |||||||||||||||
| Minimum revenue from sales and licensing for mandatory repayment due | 2,000,000 | |||||||||||||||
| Long-term embedded liability, estimated fair value | 943,000 | |||||||||||||||
| Debt issuance cost | 881,000 | |||||||||||||||
| Debt instrument, end of term fee | 250,000 | |||||||||||||||
| Debt instrument, early payment penalty | 66,000 | |||||||||||||||
| Loss on extinguishment of debt | (1,372,266) | (1,372,266) | 429,000 | |||||||||||||
| Unamortized debt discount | 187,000 | 1,900,000 | ||||||||||||||
| Unamortized debt issuance cost | 176,000 | |||||||||||||||
| Interest rate in addition to Prime rate | 6.75% | |||||||||||||||
| Interest rate in addition to amended agreement | 0.125% | |||||||||||||||
| Percentage of conversion of principal amount to Common stocks | 90.00% | |||||||||||||||
| Number of days preceding the date of conversion request | 10 days | |||||||||||||||
| Shares conversion, number of common stock equivalent to each preferred stock | 3,270 | |||||||||||||||
| Series B preferred stock issued, shares | 2,364.9 | |||||||||||||||
| Interest expense related to debt | $ 122,000 | $ 144,000 | $ 244,000 | $ 260,000 | ||||||||||||