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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock-based Compensation Expense Included in Statements of Operations | The following table summarizes the total stock-based compensation expense included in the Company’s statements of operations for the periods presented (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Cost of product sales |  | $ | 1,137 |  |  | $ | 881 |  |  | $ | 2,187 |  |  | $ | 1,761 |
Research and development |  |  | 7,894 |  |  |  | 6,420 |  |  |  | 15,551 |  |  |  | 11,721 |
Selling, general and administrative |  |  | 11,521 |  |  |  | 10,943 |  |  |  | 23,256 |  |  |  | 20,333 |
|  | $ | 20,552 |  |  | $ | 18,244 |  |  | $ | 40,994 |  |  | $ | 33,815 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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