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Debt (Tables) | 6 Months Ended
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Jun. 30, 2015
Debt Disclosure [Abstract] |
Summary of Carrying Amount | The carrying amounts of the Company’s Notes, including the 5X conversion liability, and the Term Loan as of June 30, 2015 and December 31, 2014 were as follows:
|  | At June 30, 2015 |  |  | At December 31, 2014 |
Outstanding principal: |  |  |  |  |  |  |  |
Notes, including 5X Notes |  | $ | — |  |  | $ | 29,088 |
Term Loan |  |  | 7,000 |  |  |  | — |
5X conversion liability |  |  | — |  |  |  | 10,633 |
Debt discount |  |  | (294 | ) |  |  | (18 | )
Carrying amount |  | $ | 6,706 |  |  | $ | 39,703 |
Summary of Debt Discount Activity | Debt discount activity during the six months ended June 30, 2015 was as follows:
|  | Notes, including 5X Notes |  |  | 2015 Bridge Notes |  |  | Term Loan |  |  | Total |
Balance at December 31, 2014 |  | $ | 18 |  |  | $ | — |  |  | $ | — |  |  | $ | 18 |
Discount on debt issued during the period |  |  | — |  |  |  | 1,547 |  |  |  | 300 |  |  |  | 1,847 |
Amortization of debt discount |  |  | (18 | ) |  |  | (386 | ) |  |  | (6 | ) |  |  | (410 | )
Extinguishment upon conversion of debt |  |  | — |  |  |  | (1,161 | ) |  |  | — |  |  |  | (1,161 | )
Balance at June 30, 2015 |  | $ | — |  |  | $ | — |  |  | $ | 294 |  |  | $ | 294 |
Schedule of Future Principle Payments | Future principal payments in connection with the Term Loan are as follows:
Remainder of 2015 |  | $ | — |
2016 |  |  | 1,049 |
2017 |  |  | 2,701 |
2018 |  |  | 3,250 |
|  | $ | 7,000 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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