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Fair Value of Financial Instruments - Fair Value Measurement of Debt Instruments Based on Discounted Cash Flow Model and Sensitive to Change in Yield (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Mann Group Promissory Notes | Note Payable Yield Changes 1 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | 1.00%
Note payable, percentage of hypothetical yield | 19.0
Note payable to related party, fair value | $ 78.9
Note payable to related party, fair value after change | 77.4
Change in fair value of note payable value due to change in interest rate percentage | $ (1.5)
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | (1.90%)
Mann Group Promissory Notes | Note Payable Yield Changes 2 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | (1.00%)
Note payable, percentage of hypothetical yield | 17.0
Note payable to related party, fair value | $ 78.9
Note payable to related party, fair value after change | 80.4
Change in fair value of note payable value due to change in interest rate percentage | $ 1.5
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | 1.90%
Mann Group Promissory Notes | Note Payable Yield Changes 3 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | 2.00%
Note payable, percentage of hypothetical yield | 20.0
Note payable to related party, fair value | $ 78.9
Note payable to related party, fair value after change | 76.0
Change in fair value of note payable value due to change in interest rate percentage | $ (2.9)
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | (3.70%)
Mann Group Promissory Notes | Note Payable Yield Changes 4 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | (2.00%)
Note payable, percentage of hypothetical yield | 16.0
Note payable to related party, fair value | $ 78.9
Note payable to related party, fair value after change | 82.0
Change in fair value of note payable value due to change in interest rate percentage | $ 3.1
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | 3.90%
Senior Notes | Note Payable Yield Changes 1 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | 1.00%
Note payable, percentage of hypothetical yield | 19.0
Note payable to related party, fair value | $ 7.0
Note payable to related party, fair value after change | 6.9
Change in fair value of note payable value due to change in interest rate percentage | $ (0.1)
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | (1.40%)
Senior Notes | Note Payable Yield Changes 2 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | (1.00%)
Note payable, percentage of hypothetical yield | 17.0
Note payable to related party, fair value | $ 7.0
Note payable to related party, fair value after change | 7.1
Change in fair value of note payable value due to change in interest rate percentage | $ 0.1
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | 1.40%
Senior Notes | Note Payable Yield Changes 3 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | 2.00%
Note payable, percentage of hypothetical yield | 20.0
Note payable to related party, fair value | $ 7.0
Note payable to related party, fair value after change | 6.8
Change in fair value of note payable value due to change in interest rate percentage | $ (0.2)
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | (2.90%)
Senior Notes | Note Payable Yield Changes 4 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 18.0
Note payable, percentage of interest rate increases (decreases) | (2.00%)
Note payable, percentage of hypothetical yield | 16.0
Note payable to related party, fair value | $ 7.0
Note payable to related party, fair value after change | 7.2
Change in fair value of note payable value due to change in interest rate percentage | $ 0.2
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | 2.90%
MidCap Credit Facility | Note Payable Yield Changes 1 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 7.5
Note payable, percentage of interest rate increases (decreases) | 1.00%
Note payable, percentage of hypothetical yield | 8.5
Note payable to related party, fair value | $ 55.4
Note payable to related party, fair value after change | 54.1
Change in fair value of note payable value due to change in interest rate percentage | $ (1.3)
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | (2.30%)
MidCap Credit Facility | Note Payable Yield Changes 2 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 7.5
Note payable, percentage of interest rate increases (decreases) | (1.00%)
Note payable, percentage of hypothetical yield | 6.5
Note payable to related party, fair value | $ 55.4
Note payable to related party, fair value after change | 56.6
Change in fair value of note payable value due to change in interest rate percentage | $ 1.2
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | 2.20%
MidCap Credit Facility | Note Payable Yield Changes 3 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 7.5
Note payable, percentage of interest rate increases (decreases) | 2.00%
Note payable, percentage of hypothetical yield | 9.5
Note payable to related party, fair value | $ 55.4
Note payable to related party, fair value after change | 52.9
Change in fair value of note payable value due to change in interest rate percentage | $ (2.5)
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | (4.50%)
MidCap Credit Facility | Note Payable Yield Changes 4 |
Fair Value Of Financial Instruments [Line Items] |
Note payable, percentage of yield | 7.5
Note payable, percentage of interest rate increases (decreases) | (2.00%)
Note payable, percentage of hypothetical yield | 5.5
Note payable to related party, fair value | $ 55.4
Note payable to related party, fair value after change | 57.9
Change in fair value of note payable value due to change in interest rate percentage | $ 2.5
Increase (decrease) in fair value of note payable percentage due to increases (decreases) in interest rate percentage | 4.50%

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