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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Major Customers | Revenue from significant partners, which is defined as 10% or more of our total revenue, was as follows:
| December 31, |  |  |  |
| 2019 |  | 2018 |  | 2017
Partner A | 13 | % |  | 40 | % |  | 46 | %
Partner B | 27 | % |  | 13 | % |  | 19 | %
Partner C | < 10% |  |  | 20 | % |  | < 10% |
Schedule of Commercial License Rights | Commercial license and other economic rights consist of the following (in thousands):
| As of December 31, |  |
| 2019 |  | 2018
Aziyo & CorMatrix | $ | 17,696 |  |  | $ | 17,696 |
Palvella | 10,000 |  |  | 10,000 |
Selexis | 8,602 |  |  | 8,602 |
Dianomi | 2,000 |  |  | — |
| 38,298 |  |  | 36,298 |
Less: accumulated amortization attributed to principal or research and development | (18,208) |  |  | (4,838) |
Total commercial license and other economic rights, net | $ | 20,090 |  |  | $ | 31,460 |
Schedule of Disaggregation of Revenue | Royalty revenue for 2019, 2018 and 2017 are reported as below (in thousands):
|  | Year ended December 31, |  |  |  |
|  | 2019(1) |  | 2018(1) |  | 2017(2)
Promacta |  | $ | 14,193 |  |  | $ | 99,260 |  |  | $ | 62,918 |
Kyprolis |  | 25,046 |  |  | 21,686 |  |  | 16,413 |
Evomela |  | 5,171 |  |  | 5,658 |  |  | 7,155 |
Other |  | 2,566 |  |  | 1,952 |  |  | 2,199 |
|  | $ | 46,976 |  |  | $ | 128,556 |  |  | $ | 88,685 |
(1) Royalty revenue for 2019 and 2018 was reported under the current revenue recognition guidance (ASC 606). (2) Royalty revenue for 2017 was reported under the legacy revenue recognition guidance (ASC 605). The following table represents disaggregation of Material Sales and License fees, milestone and other (in thousands), which are not affected by the adoption of ASC 606:
|  | Year ended December 31, |  |  |  |
|  | 2019 |  | 2018 |  | 2017
Material Sales |  |  |  |  |  |
Captisol |  | $ | 31,489 |  |  | $ | 29,123 |  |  | $ | 22,070 |
License fees, milestones and other |  |  |  |  |  |
License fees |  | 6,199 |  |  | 78,195 |  |  | 13,665 |
Milestones |  | 23,451 |  |  | 6,577 |  |  | 11,093 |
Other |  | 12,167 |  |  | 9,002 |  |  | 5,589 |
|  | $ | 41,817 |  |  | $ | 93,774 |  |  | $ | 30,347 |
Schedule of Computation of Basic and Diluted Net Income (Loss) per Share | The following table presents the calculation of weighted average shares used to calculate basic and diluted earnings per share (in thousands):
| Year Ended December 31, |  |  |  |
| 2019 |  | 2018 |  | 2017
Weighted average shares outstanding: | 18,995 |  |  | 21,160 |  |  | 21,032 |
Dilutive potential common shares: |  |  |  |  |
Restricted stock | 43 |  |  | 72 |  |  | 141 |
Stock options | 719 |  |  | 1,125 |  |  | 1,000 |
Warrants associated with 2019 Notes | — |  |  | 1,017 |  |  | 94 |
2019 Convertible Senior Notes | — |  |  | 693 |  |  | 1,214 |
Shares used to compute diluted income per share | 19,757 |  |  | 24,067 |  |  | 23,481 |
Potentially dilutive shares excluded from calculation due to anti-dilutive effect | 8,926 |  |  | 2,845 |  |  | 335 |

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