Basis of Presentation and Significant Accounting Policies - Purchase of Rights to Future Milestones and Royalties and Income Taxes and Net Income (Loss) per Share (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Purchase of Rights to Future Milestones and Royalties | ||
| Impairment of long-term royalty receivable | $ 0.0 | $ 0.0 |
| Income tax penalties or interest charged | 0.0 | |
| Dividends declared | $ 0.0 | |
| X | ||||||||||
- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long term royalty receivable assets. No definition available.
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| X | ||||||||||
- References No definition available.
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