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Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Apr. 10, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Amount Due	$ 122.9
MidCap Credit Facility
Debt Instrument [Line Items]
Amount Due	$ 50.0		$ 40.0
Maturity date	2024-08
LIBOR | MidCap Credit Facility
Debt Instrument [Line Items]
Annual interest rate	2.00%
Interest rate floor	6.75%
5.75% 2024 Convertible Note
Debt Instrument [Line Items]
Amount Due	$ 5.0		5.0
Annual interest rate	5.75%
Maturity date	2024-11
Conversion price	$ 3.00
June 2020 Note
Debt Instrument [Line Items]
Amount Due			2.6
Maturity date	2020-06
December 2020 Note
Debt Instrument [Line Items]
Amount Due			2.6
Maturity date	2020-12
PPP Loan
Debt Instrument [Line Items]
Amount Due	$ 4.9
Annual interest rate	0.98%	0.98%
Maturity date	2022-04
The Mann Group | Convertible Promissory Note
Debt Instrument [Line Items]
Amount Due	$ 28.0		35.0
Accrued interest paid-in-kind	$ 0.6		1.0
Annual interest rate	7.00%
Maturity date	2024-11
Conversion price	$ 2.50
The Mann Group | Non Convertible Promissory Note
Debt Instrument [Line Items]
Amount Due	$ 35.0		35.1
Accrued interest paid-in-kind	$ 3.6		$ 1.0
Annual interest rate	7.00%
Maturity date	2024-11

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
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