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Intangible Assets (Narrative) (Details) - USD ($) shares in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2018 | Nov. 30, 2016 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill |  |  | $ 882,000 | $ 882,000 |
Other revenue, potential upfront payment related to product sales |  |  | 4,800,000 |  |
Payments to acquire businesses |  |  | 0 | 5,000,000 | $ 20,000,000
Additions to intangible assets |  |  | 1,973,110 | 772,944 | 3,819,486
Amortization of intangible assets |  |  | 4,434,120 | 4,134,557 | $ 2,769,466
Product and License Rights |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross |  |  | 38,543,542 | 37,400,742 |
Patents |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross |  |  | 10,306,922 | 9,882,511 |
Additions to intangible assets |  |  | 500,000 | $ 700,000 |
Methotrexate |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Payments to acquire businesses |  | $ 100,000 |  |  |
Stock issued during period, acquisitions |  |  | 900,000 |  |
Intellectual property amortizable intangible assets |  |  | 2,800,000 |  |
Methotrexate | Nordic |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Stock issued during period, acquisitions |  |  | 1,000,000.0 |  |
Methotrexate | Restricted Stock |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Stock issued during period, acquisitions (in shares) |  | 180 |  |  |
VIBATIV |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 882,000 |  |  |  |
Payments to acquire businesses | 20,000,000.0 |  | 20,000,000 |  |
Intellectual property amortizable intangible assets | $ 11,750,000 |  |  |  |
Increase in goodwill |  |  | $ 100,000 |  |

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