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Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2019
Accounting Policies [Abstract] |
Summary of Impact of Accounts Receivable Reserves on Gross Trade Accounts Receivable Balances | The following table summarizes the impact of accounts receivable reserves on the gross trade accounts receivable balances as of March 31, 2019 and December 31, 2018:
In thousands |  | March 31, 2019 |  |  | December 31, 2018 |
Gross trade accounts receivable |  | $ | 104,011 |  |  | $ | 86,133 |
Trade allowances |  |  | (23,992 | ) |  |  | (19,495 | )
Chargebacks |  |  | (534 | ) |  |  | (115 | )
Accounts receivable, net |  | $ | 79,485 |  |  | $ | 66,523 |
Calculation of Net Loss and Number of Shares Used to Compute Basic and Diluted Net Loss per Share | The calculation of net loss and the number of shares used to compute basic and diluted net loss per share for the three months ended March 31, 2019 and 2018 are as follows:
|  | Three months ended March 31, |  |
In thousands |  | 2019 |  |  | 2018 |  |
Net loss—basic and diluted |  | $ | (24,431 | ) |  | $ | (24,095 | ) |
Weighted average shares outstanding—basic and diluted |  |  | 328,712 |  |  |  | 285,207 |  |
Net loss per share—basic and diluted |  | $ | (0.07 | ) |  | $ | (0.08 | ) |
Anti-Dilutive Securities Not Included in the Computation of Net Loss or Earnings per Share | For the three months ended March 31, 2019 and 2018, 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 March 31, |  |
In thousands |  | 2019 |  |  | 2018 |  |
Stock options |  |  | 16,837 |  |  |  | 25,703 |  |
Restricted stock and restricted stock units |  |  | 9,341 |  |  |  | 12,420 |  |
Exchangeable senior notes (if converted) |  |  | — |  |  |  | 7,716 |  |
Preferred stock (if converted) |  |  | 28,932 |  |  |  | 32,818 |  |
Assets and Liability Measured at Fair Value on a Recurring Basis | The following tables present information about the Company’s assets and liabilities as of March 31, 2019 and December 31, 2018 that are measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value:
|  | March 31, 2019 |
In thousands |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Asset: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents—money markets |  | $ | 9,945 |  |  | $ | 9,945 |  |  | $ | — |  |  | $ | — |
|  | December 31, 2018 |
In thousands |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Asset: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents—money markets |  | $ | 9,880 |  |  | $ | 9,880 |  |  | $ | — |  |  | $ | — |
Carrying Amounts and Estimated Fair Values of Debt Instruments | The carrying amounts of cash, cash equivalents, accounts payable and accrued liabilities approximate fair value because of their short-term nature. The carrying amounts and the estimated fair values of debt instruments as of March 31, 2019 and December 31, 2018 are as follows:
|  | March 31, 2019 |  |  | December 31, 2018 |
In thousands |  | Carrying Value |  |  | Estimated Fair Value |  |  | Carrying Value |  |  | Estimated Fair Value |
Current portion of long-term debt from royalty-bearing instrument, net of accrued interest |  | $ | 38,394 |  |  |  |  |  |  | $ | 33,602 |  |  |  |  |
Long-term debt from royalty-bearing instrument |  |  | 35,338 |  |  |  |  |  |  |  | 46,108 |  |  |  |  |
Total long-term debt from royalty-bearing instrument |  | $ | 73,732 |  |  | $ | 72,600 |  |  | $ | 79,710 |  |  | $ | 78,600 |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=99377789&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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