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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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