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Borrowings (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Summary of Carrying Amount of Borrowings

Carrying amount of borrowings consist of the following (in thousands):

		December 31,
		2020				2019
Mann Group promissory notes		$	63,027			$	70,020
MidCap Credit Facility			49,335				38,851
Senior notes (2024 convertible notes)			5,000				10,028
PPP Loan			4,873				—
Total debt — net carrying amount		$	122,235			$	118,899

Schedule of Line of Credit Facility Debt and Key Terms

The following table provides a summary of the Company’s debt and key terms:

Amount Due

Terms

December 31, 2020

December 31, 2019

Annual Interest Rate

Maturity Date

Conversion Price

Mann Group convertible    note

$28.0 million (plus $0.6 million accrued interest paid-in-kind)

$35.0 million (plus $1.0 million accrued interest paid-in-kind)

7.00%

November 2024

$2.50 per share

Mann Group non-    convertible note

$35.1 million (plus $3.6 million accrued interest paid-in-kind)

$35.1 million (plus $1.0 million accrued interest paid-in-kind)

7.00%

November 2024

N/A

MidCap Credit    Facility

$50.0 million

$40.0 million

one-month LIBOR (2% floor) plus 6.75%

August 2024

N/A

2024 convertible notes

$5.0 million

$5.0 million

5.75%

November 2024

$3.00 per share

June 2020 note

—

$2.6 million

—

June 2020

N/A

December 2020 note

—

$2.6 million

—

December 2020

N/A

PPP Loan

$4.9 million

—

0.98%

April 2022

N/A

Schedule of Maturities of Our Borrowings

The maturities of our borrowings as of December 31, 2020 are as follows (in thousands):

	Amounts
2021		4,061
2022		9,145
2023		25,000
2024		84,718
Total principal payments		122,924
Unamortized discount		(665	)
Debt issuance costs		(24	)
Total debt	$	122,235

Schedule of Amortization of Premium and Accretion of Debt Issuance Costs

Amortization of the premium and accretion of debt issuance costs related to all borrowings for the years ended December 31, 2020 and 2019 are as follows (in thousands):

		Year Ended December 31,
		2020				2019
Amortization of debt premium		$	—			$	(1,049	)
Amortization of debt discount			268				295
Accretion expense — debt issuance cost			(101	)			(111	)

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