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Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2014
Summarizes Activity of the Product Revenue Allowance and Reserve Categories | The following table summarizes activity in each of the product revenue allowance and reserve categories described above for the nine months ended September 30, 2014 and 2013 (in thousands):
|  | Trade Allowances |  |  | Rebates, Chargebacks and Discounts |  |  | Product Returns |  |  | Other Incentives |  |  | Total |
Balance at January 1, 2014 |  | $ | 1,071 |  |  | $ | 1,137 |  |  | $ | 72 |  |  | $ | 189 |  |  | $ | 2,469 |
Provision related to current period sales |  |  | 5,514 |  |  |  | 8,335 |  |  |  | 270 |  |  |  | 3,845 |  |  |  | 17,964 |
Provision related to prior period sales |  |  | — |  |  |  | — |  |  |  | 12 |  |  |  | — |  |  |  | 12 |
Credits/payments made for current period sales |  |  | (4,120 | ) |  |  | (5,876 | ) |  |  | — |  |  |  | (3,759 | ) |  |  | (13,755 | )
Credits/payments made for prior period sales |  |  | (925 | ) |  |  | (911 | ) |  |  | — |  |  |  | — |  |  |  | (1,836 | )
Balance at September 30, 2014 |  | $ | 1,540 |  |  | $ | 2,685 |  |  | $ | 354 |  |  | $ | 275 |  |  | $ | 4,854 |
|  | Trade Allowances |  |  | Rebates, Chargebacks and Discounts |  |  | Product Returns |  |  | Other Incentives |  |  | Total |
Balance at January 1, 2013 |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Provision related to current period and deferred sales |  |  | 2,839 |  |  |  | 2,418 |  |  |  | 72 |  |  |  | 2,018 |  |  |  | 7,347 |
Credits/payments made for current period and deferred sales |  |  | (1,951 | ) |  |  | (1,484 | ) |  |  | — |  |  |  | (1,835 | ) |  |  | (5,270 | )
Balance at September 30, 2013 |  | $ | 888 |  |  | $ | 934 |  |  | $ | 72 |  |  | $ | 183 |  |  | $ | 2,077 |
Product Revenue Recognized and Deferred | The following table summarizes product revenue recognized and deferred during the nine months ended September 30, 2014 and 2013 (in thousands):
|  | September 30, 2014 |  |  | September 30, 2013 |
Product revenue recognized |  | $ | 37,722 |  |  | $ | 16,245 |
Deferred product revenue |  |  | — |  |  |  | 1,617 |
|  | $ | 37,722 |  |  | $ | 17,862 |
Expensed and Capitalized Cost of Goods | In conjunction with the Company’s recognition and deferral of product revenues, the Company expensed and capitalized the associated cost of goods, as follows, during the nine months ended September 30, 2014 and 2013 (in thousands):
|  | September 30, 2014 |  |  | September 30, 2013 |
Cost of goods sold expensed |  | $ | 14,637 |  |  | $ | 7,813 |
Finished goods inventory held by others |  |  | — |  |  |  | 641 |
|  | $ | 14,637 |  |  | $ | 8,454 |
Estimated Useful Lives | The estimated useful lives, by asset classification, are as follows:
Asset Classification |  | Useful Lives
Computer equipment and software |  | 3 - 5 years
Furniture and fixtures |  | 5 years
Leasehold improvements |  | Lesser of useful life or lease term
Net Income Loss and the Number of Shares Used to Compute Basic and Diluted Loss per Share | The calculation of net loss and the number of shares used to compute basic and diluted loss per share for the three and nine months ended September 30, 2014 and 2013 are as follows:
|  | Three months ended |  |  | Nine months ended |
In thousands |  | September 30, 2014 |  |  | September 30, 2013 |  |  | September 30, 2014 |  |  | September 30, 2013 |
Net loss—basic |  | $ | (26,050 | ) |  | $ | (48,884 | ) |  | $ | (36,707 | ) |  | $ | (150,816 | )
Gain on warrant derivative liability |  |  | (4,392 | ) |  |  | — |  |  |  | (6,773 | ) |  |  | (15,256 | )
Net loss—diluted |  |  | (30,442 | ) |  |  | (48,884 | ) |  |  | (43,480 | ) |  |  | (166,072 | )
Net loss per share—basic |  |  | (0.15 | ) |  |  | (0.29 | ) |  |  | (0.21 | ) |  |  | (0.96 | )
Weighted average shares outstanding—basic |  |  | 174,502 |  |  |  | 170,187 |  |  |  | 173,426 |  |  |  | 157,105 |
Effect of dilutive warrants |  |  | 639 |  |  |  | — |  |  |  | 879 |  |  |  | 6,382 |
Weighted average shares outstanding—diluted |  |  | 175,141 |  |  |  | 170,187 |  |  |  | 174,305 |  |  |  | 163,487 |
Net loss per share—diluted |  |  | (0.17 | ) |  |  | (0.29 | ) |  |  | (0.25 | ) |  |  | (1.02 | )
Anti-Dilutive Securities Not Included in the Computation of Net Loss per Share | For the three and nine months ended September 30, 2014 and 2013, the following potentially dilutive securities were not included in the computation of net loss per share because the effect would be anti-dilutive:
|  | Three months ended |  |  | Nine months ended |
In thousands |  | September 30, 2014 |  |  | September 30, 2013 |  |  | September 30, 2014 |  |  | September 30, 2013 |
Stock options |  |  | 11,246 |  |  |  | 10,866 |  |  |  | 11,246 |  |  |  | 10,866 |
Restricted stock and restricted stock units |  |  | 2,262 |  |  |  | 824 |  |  |  | 2,262 |  |  |  | 824 |
Warrants |  |  | — |  |  |  | 9,817 |  |  |  | — |  |  |  | 1,702 |
Exchangeable senior notes (if converted) |  |  | 49,215 |  |  |  | 17,021 |  |  |  | 49,215 |  |  |  | 17,021 |
Assets and Liability Measured at Fair Value on a Recurring Basis | The following table presents information about the Company’s assets and liabilities as of September 30, 2014 and December 31, 2013 that are measured at fair value on a recurring basis and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value:
|  | September 30, 2014 |
In millions |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Asset: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents—money markets |  | $ | 65.1 |  |  | $ | 65.1 |  |  | $ | — |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant derivative liability |  | $ | 0.1 |  |  | $ | — |  |  | $ | — |  |  | $ | 0.1 |
Long-term debt derivative liabilities |  | $ | 9.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 9.0 |
|  | December 31, 2013 |
In millions |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Asset: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents—money markets |  | $ | 113.5 |  |  | $ | 113.5 |  |  | $ | — |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant derivative liability |  | $ | 6.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 6.9 |
Long-term debt derivative liability |  | $ | 11.1 |  |  | $ | — |  |  | $ | — |  |  | $ | 11.1 |
Carrying Amounts and Estimated Fair Values of Debt Instruments | The carrying amounts and the estimated fair values of debt instruments as of September 30, 2014 and December 31, 2013, are as follows:
|  | September 30, 2014 |  |  | December 31, 2013 |
In thousands |  | Carrying Value |  |  | Estimated Fair Value |  |  | Carrying Value |  |  | Estimated Fair Value |
Long-term debt—December 2012 financing |  | $ | 89,152 |  |  | $ | 79,400 |  |  | $ | 87,717 |  |  | $ | 75,700 |
2012 Notes |  |  | 31,266 |  |  |  | 24,100 |  |  |  | 149,317 |  |  |  | 106,600 |
2014 Notes |  |  | 89,221 |  |  |  | 78,700 |  |  |  | — |  |  |  | — |
Warrant |
Change in Fair Value of Derivative Liabilities | The change in the fair value of derivative liabilities is as follows (in thousands):
|  |  |  |  | October 2009 Warrants |  |  | Long-Term Debt Derivative Liabilities |  |  | Totals |
Balance at December 31, 2013 |  |  |  |  |  | $ | 6,894 |  |  | $ | 11,100 |  |  | $ | 17,994 |
Record initial fair value of derivative liability on 2014 senior notes |  |  |  |  |  |  | — |  |  |  | 3,500 |  |  |  | 3,500 |
Gain on change in fair value of derivative liabilities |  |  |  |  |  |  | (6,270 | ) |  |  | (5,600 | ) |  |  | (11,870 | )
Compensation income for change in fair value of warrants issued to former employees |  |  |  |  |  |  | (503 | ) |  |  | — |  |  |  | (503 | )
Balance at September 30, 2014 |  |  |  |  |  | $ | 121 |  |  | $ | 9,000 |  |  | $ | 9,121 |
|  | October 2009 Warrants |  |  | Long-Term Debt Derivative Liability |  |  | Foreign Exchange Contracts |  |  | Totals |
Balance at December 31, 2012 |  | $ | 54,854 |  |  | $ | 14,577 |  |  | $ | — |  |  | $ | 69,431 |
(Gain) loss on change in fair value of derivative liability |  |  | (14,077 | ) |  |  | (7,377 | ) |  |  | 395 |  |  |  | (21,059 | )
Compensation income for change in fair value of warrants issued to former employees |  |  | (1,179 | ) |  |  | — |  |  |  | — |  |  |  | (1,179 | )
Balance at September 30, 2013 |  | $ | 39,598 |  |  | $ | 7,200 |  |  | $ | 395 |  |  | $ | 47,193 |

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