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Divestiture of the Pediatric Assets (Details) - USD ($) $ in Thousands |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 12, 2018 | Jan. 31, 2021 | Dec. 31, 2013 | Dec. 31, 2020 | Dec. 31, 2019 | Oct. 10, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Percentage of royalty payable on net sales |  |  | 0.834% |  |  |
Guarantee to Deerfield |  |  |  | $ 1,053 | $ 1,372 |
2016 MIPA | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Debt instrument, periodic payment, interest | $ 263 |  |  |  |  |
Noncash or part noncash acquisition, debt assumed | 2,625 |  |  |  |  |
Research and development reimbursement, in excess of | 1,000 |  |  |  |  |
Guarantee to Deerfield | 6,643 |  |  |  |  |
Guaranty assets | $ 6,620 |  |  |  |  |
2016 MIPA | Discontinued Operations, Disposed of by Sale | FSC |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Percentage of royalty payable on net sales | 15.00% |  |  |  |  |
Royalty payable on net sales, maximum | $ 10,300 |  |  |  |  |
2016 MIPA | Discontinued Operations, Disposed of by Sale | Scenario, Forecast |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Repayments of assumed debt |  | $ 15,263 |  |  |  |
Cerecor | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Guarantee to Deerfield |  |  |  | 1,372 | 1,827 |
Guaranty assets |  |  |  | $ 1,368 | $ 1,821 | $ 15,000
Escrow deposit |  |  |  |  |  | $ 15,000

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