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Fair Value of Financial Instruments - Fair Value of Financial Instruments (Parenthetical) (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
MidCap Credit Facility |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, percentage of hypothetical yield | 12 | 12
Note payable, percentage of interest rate increases (decreases) | 2.00% | 2.00%
MidCap Credit Facility | Minimum |  |
Fair Value Of Financial Instruments [Line Items] |  |
Financial liabilities fair value | $ 35.0 | $ 40.0
MidCap Credit Facility | Maximum |  |
Fair Value Of Financial Instruments [Line Items] |  |
Financial liabilities fair value | $ 36.0 | $ 42.4
Mann Group Convertible Notes |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, percentage of hypothetical yield | 13 | 13
Note payable, percentage of interest rate increases (decreases) | 2.00% | 2.00%
Mann Group Convertible Notes | Volatility |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 62.7 | 77.8
Mann Group Convertible Notes | Minimum |  |
Fair Value Of Financial Instruments [Line Items] |  |
Financial liabilities fair value | $ 14.2 | $ 20.5
Mann Group Convertible Notes | Maximum |  |
Fair Value Of Financial Instruments [Line Items] |  |
Financial liabilities fair value | $ 14.7 | $ 21.2
Senior Convertible Notes |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, percentage of hypothetical yield | 11 | 13
Note payable, percentage of interest rate increases (decreases) | 2.00% | 2.00%
Senior Convertible Notes | Volatility |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 62.7 | 75.8
Senior Convertible Notes | Minimum |  |
Fair Value Of Financial Instruments [Line Items] |  |
Financial liabilities fair value | $ 224.1 | $ 245.0
Senior Convertible Notes | Maximum |  |
Fair Value Of Financial Instruments [Line Items] |  |
Financial liabilities fair value | $ 238.9 | $ 263.4
Milestone Rights | Risk-Free Rate |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 3.88 | 3.99
Milestone Rights | Dividend Yield |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 0 | 0
Milestone Rights | Volatility |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 50 | 50
Milestone Rights | Period |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 8 | 8
Milestone Rights | Credit Risk |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 17 | 17
Contingent Milestone Liability | Risk-Free Rate |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 4.01 | 4.01
Contingent Milestone Liability | Dividend Yield |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 0 | 0
Contingent Milestone Liability | Volatility |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 43 | 43
Contingent Milestone Liability | Period |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 15 | 15
Contingent Milestone Liability | Credit Risk |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, fair value key inputs | 17 | 17
Financing Liability |  |
Fair Value Of Financial Instruments [Line Items] |  |
Note payable, percentage of hypothetical yield | 9.5 | 10

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- Definition Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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