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Long-Term Debt | 12 Months Ended
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Dec. 31, 2014
Debt Disclosure [Abstract] |
Long-Term Debt |
10. | Long-Term Debt
In December 2014, we entered into a Loan and Security Agreement (“Loan Agreement”) with Hercules Technology Growth Capital, Inc. (“Hercules”) under which we may borrow up to $40.0 million in two tranches. We drew down the first tranche of $10.0 million upon closing of the transaction on December 23, 2014. The second tranche, of $30.0 million, can be drawn at our option any time prior to September 30, 2015, but only if we have achieved certain milestones relating to the ongoing HEPLISAV–B Phase 3 study (“Milestone A”). We plan to use the proceeds received under the Loan Agreement to provide additional funding for HEPLISAV–B development and pre-commercialization activities, as a potential source of funding for clinical trials for its cancer immunotherapeutic product candidate, SD-101, and for general corporate purposes. The interest rate for each tranche in the Loan Agreement is calculated at a rate equal to the greater of either (i) 9.75% plus the prime rate as reported from time to time in The Wall Street Journal minus 5.25%, and (ii) 9.75%. Payments under the Loan Agreement are interest only until February 1, 2016 (which will be extended until August 1, 2016, if we achieve Milestone A on or before September 30, 2015, and which will be extended until February 1, 2017, if we meet certain additional HEPLISAV-B Phase 3 related milestones (“Milestone B”) on or before August 1, 2016). The interest only period will be followed by equal monthly payments of principal and interest amortized over a 30 month schedule through the scheduled maturity date on July 1, 2018 (which would be extended through January 1, 2019 if we achieve Milestone A on or before September 30, 2015 or Milestone B on or before August 1, 2016) (the “Loan Maturity Date”). The entire principal balance, including a balloon payment of principal, as applicable, will be due and payable on the Loan Maturity Date, which we recorded as a liability and debt discount at the origination of the loan. A final payment equal to $840,000 (if an aggregate of $10.0 million is advanced under the Loan Agreement) or $2,400,000 (if an aggregate of $40.0 million is advanced under the Loan Agreement) will be due on the Loan Maturity Date, or such earlier date specified in the Loan Agreement. Our obligations under the Loan Agreement are secured by a security interest in substantially all of its assets, other than its intellectual property. Additionally, we paid a $400,000 facility charge to Hercules. The debt issuance costs and final payment fee are being amortized and accreted, respectively, to interest expense over the term of the term loan using the effective interest method. In addition, Hercules was granted the right, at its discretion, to participate in any Subsequent Financing in an aggregate amount of up to $1,500,000 (that is, a maximum amount of $1,500,000 with respect to all subsequent financings collectively) on the same terms, conditions and pricing afforded to others participating in any such Subsequent Financing. The Hercules Loan Agreement includes customary affirmative and restrictive covenants, but does not include any financial maintenance covenants, and also includes standard events of default. At December 31, 2014, we were in compliance with all loan covenants. Upon an event of default, including a change of control, Hercules has the option to accelerate repayment of the loan, including payment of any applicable prepayment charges, which is 1.50% of the outstanding loan balance and accrued but unpaid interest. As of December 31, 2014, we had outstanding borrowings under the Hercules Loan Agreement of $10.0 million, with a carrying value of $9.6 million, net of the debt discounts of the $0.4 million facility charge and a $45 thousand commitment fee. Amortization of the debt discount was immaterial for the year ended December 31, 2014. The following table summarizes our outstanding future minimum payments associated with our long-term debt as of December 31, 2014 (in thousands):
Obligations: |  | Total |  |  | 2015 |  |  | 2016-2017 |  |  | 2018-2019 |  |  | 2020 and Thereafter |
Principal payments on long-term debt |  | $ | 10,000 |  |  | $ | - |  |  | $ | 7,425 |  |  | $ | 2,575 |  |  | $ | - |
Interest payments on long-term debt |  |  | 2,343 |  |  |  | 929 |  |  |  | 1,328 |  |  |  | 86 |  |  |  | - |
Total |  | $ | 12,343 |  |  | $ | 929 |  |  | $ | 8,753 |  |  | $ | 2,661 |  |  | $ | - |

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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