Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Detail) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	9 Months Ended
		Aug. 31, 2022	Sep. 30, 2022		Dec. 31, 2021	Mar. 04, 2021
Debt Instrument [Line Items]
Amount Due			$ 278.8
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
MidCap Credit Facility
Debt Instrument [Line Items]
Amount Due	[1]		$ 40.0		40.0
Maturity date	[1]		2025-08
SOFR | MidCap Credit Facility
Debt Instrument [Line Items]
Annual interest rate		6.25%	6.25%	[1]
Interest rate floor		1.00%	1.00%	[1]
Interest rate cap		8.25%	8.25%	[1]
Mann Group | Convertible Promissory Note
Debt Instrument [Line Items]
Amount Due			$ 8.8		18.4
Accrued interest paid-in-kind					$ 0.4
Annual interest rate	[2]		2.50%
Maturity date	[2]		2025-12

[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 and after the amendment was 7.00% and the maturity date was in November 2024.