Notes Payable (Narrative) (Details)
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1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
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Sep. 30, 2014
shares
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Aug. 31, 2013
USD ($)
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Jul. 31, 2013 |
Jan. 31, 2013 |
Aug. 31, 2012
$ / shares
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Dec. 31, 2011 |
Oct. 31, 2011 |
Sep. 30, 2015
USD ($)
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Sep. 30, 2014
USD ($)
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Sep. 30, 2015
USD ($)
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Sep. 30, 2014
USD ($)
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Dec. 31, 2014
USD ($)
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Aug. 31, 2014
USD ($)
$ / shares
shares
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Feb. 28, 2014
shares
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Dec. 31, 2013
shares
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Dec. 14, 2013 |
Jan. 10, 2013
USD ($)
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Dec. 31, 2012
shares
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Aug. 07, 2012
USD ($)
shares
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Oct. 20, 2011
USD ($)
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 950,000
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| Maturity date |
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Oct. 31, 2019
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| Reverse stock split, conversion ratio |
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0.4348
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| Warrant [Member] |
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| Debt Instrument [Line Items] |
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| Number of shares of common stock issuable through warrants | shares |
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20,549
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20,549
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| Debt discount |
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$ 323,021
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| Number of shares issued from cashless exercise of warrant | shares |
17,664
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| Secured Loan - Square 1 Bank [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, amount outstanding |
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$ 5,250,000
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$ 5,250,000
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| Term of loan |
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42 months
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| Number of shares of common stock issuable through warrants | shares |
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52,695
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| Debt instrument, minimum interest rate |
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3.05%
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3.05%
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| Debt instrument, maximum interest rate |
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6.30%
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6.30%
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| Repayment of principal made during period |
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145,161
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$ 145,161
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$ 0
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$ 0
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$ 0
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| Interest paid during period |
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83,090
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$ 0
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181,520
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$ 0
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24,150
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| Exercise price of warrants | $ / shares |
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$ 4.27
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| Secured Loan - Square 1 Bank [Member] | Warrant [Member] |
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| Debt Instrument [Line Items] |
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| Debt discount |
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323,021
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$ 323,021
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| Secured Loan - Square 1 Bank [Member] | Common Stock [Member] |
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| Debt Instrument [Line Items] |
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| Number of shares issued from cashless exercise of warrant | shares |
17,664
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| Secured Loan - Square 1 Bank [Member] | Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 7,500,000
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| North Carolina Biotechnology Center Loan Agreement [Member] |
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| Debt Instrument [Line Items] |
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| Annual installments |
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5.00%
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| North Carolina Biotechnology Center Loan Agreement [Member] | Series A Preferred Stock [Member] |
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| Debt Instrument [Line Items] |
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| Warrant expiration date |
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Dec. 13, 2021
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| Loan And Security Agreement Tranche A [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 1,000,000
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| Accrues interest, annual |
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6.00%
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| Accrues interest, monthly |
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3.00%
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| Term of loan |
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36 months
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| Periodic payments, frequency |
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Monthly
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| Loan And Security Agreement Term Loan B [Member] |
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| Debt Instrument [Line Items] |
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| Annual installments |
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5.00%
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5.00%
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| Accrues interest, annual |
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4.25%
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| Repayment of note payable and bank loan |
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$ 725,000
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| Loan And Security Agreement Term Loan B [Member] | Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 225,000
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| Loan And Security Agreement [Member] |
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| Debt Instrument [Line Items] |
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| Number Of Warrants Post Reverse Stock Split |
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7,609
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| Number of shares of common stock issuable through warrants | shares |
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3,072
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| Loan And Security Agreement [Member] | Series A Preferred Stock [Member] |
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| Debt Instrument [Line Items] |
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| Preferred stock shares purchased by warrant issued | shares |
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17,500
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| Exercise price of warrants | $ / shares |
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$ 4.83
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| Warrant expiration date |
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Aug. 07, 2022
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| Loan And Security Agreement Second Amendment [Member] |
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| Debt Instrument [Line Items] |
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| Outstanding loan |
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$ 200,000
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| Collateral amount |
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200,000
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| Maturity date |
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Jan. 09, 2014
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| Loan And Security Agreement Second Amendment [Member] | Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 200,000
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| Tranche 1 Loan [Member] | Secured Loan - Square 1 Bank [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 1,500,000
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| Debt instrument, amount outstanding |
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1,500,000
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1,500,000
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1,500,000
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| Tranche 2 Loan [Member] | Secured Loan - Square 1 Bank [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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1,500,000
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| Debt instrument, amount outstanding |
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1,500,000
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1,500,000
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1,500,000
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| Tranche 3 Loan [Member] | Secured Loan - Square 1 Bank [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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2,250,000
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| Debt instrument, amount outstanding |
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$ 2,250,000
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$ 2,250,000
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| Tranche 3 Loan [Member] | Secured Loan - Square 1 Bank [Member] | Scenario, Forecast [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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2,250,000
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| Tranche 4 Loan [Member] | Secured Loan - Square 1 Bank [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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2,250,000
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| Tranche 4 Loan [Member] | Secured Loan - Square 1 Bank [Member] | Scenario, Forecast [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, face amount |
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$ 2,250,000
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| Tranche 1 and 2 Loan [Member] | Secured Loan - Square 1 Bank [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, amount outstanding |
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$ 3,000,000
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