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Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Mar. 04, 2021
Debt Instrument [Line Items] |  |  |  |
Amount Due |  | $ 288.4 |  |
Senior Convertible Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount Due |  | $ 230.0 | $ 230.0 |
Annual interest rate |  | 2.50% |  |
Maturity date |  | 2026-03 |  |
Conversion price |  | $ 5.21 |  | $ 5.21
MidCap Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount Due | [1] | $ 40.0 | 40.0 |
Maturity date | [1] | 2025-08 |  |
MidCap Credit Facility | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Annual interest rate | [1] | 6.25% |  |
Interest rate floor | [1] | 1.00% |  |
Mann Group | Convertible Promissory Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount Due |  | $ 18.4 | 18.4 |
Accrued interest paid-in-kind |  | $ 0.5 | $ 0.4 |
Annual interest rate | [2] | 2.50% |  |
Maturity date | [2] | 2025-12 |  |
Conversion price |  | $ 2.50 |  |
[1] | In April 2021, the Company prepaid $10.0 million principal balance and amended the MidCap credit facility. The interest rate prior to the amendment was one-month LIBOR (2% floor) plus 6.75% and the maturity date was in August 2024.
[2] | In April 2021, the Mann Group convertible note was amended. The interest rate prior to the amendment was 7.00% and the maturity date was in November 2024.

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