Borrowings (Tables)

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Summary of Carrying Amount of Principal Borrowings

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

	March 31, 2022		December 31, 2021
Senior convertible notes	$	224,307	$	223,944
MidCap credit facility		38,939		38,833
Mann Group promissory notes		18,425		18,425
Total debt — net carrying amount	$	281,671	$	281,202

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
	March 31, 2022	December 31, 2021	Annual Interest Rate			Maturity Date			Conversion Price
Senior convertible notes	$230.0 million	$230.0 million	2.50%			March 2026			$5.21 per share
MidCap credit facility(1)	$40.0 million	$40.0 million	one-month LIBOR (1% floor) plus 6.25%	(1	)	August 2025	(1	)	N/A
Mann Group convertible note	$18.4 million (plus $0.5 million accrued interest paid-in-kind)	$18.4 million (plus $0.4 million accrued interest paid-in-kind)	2.50%	(2	)	December 2025	(2	)	$2.50 per share

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(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.

Schedule of Maturities of Our Borrowings

The maturities of the Company’s borrowings as of March 31, 2022 are as follows (in thousands):

	Amounts
2022	$	—
2023		6,667
2024		20,000
2025		31,758
Thereafter		230,000
Total principal payments		288,425
Unamortized discount		(1,061	)
Debt issuance costs		(5,693	)
Total debt — net carrying amount	$	281,671

Schedule of Amortization of Debt Premium and Accretion of Debt Discount and Debt Issuance Cost

Amortization of debt discount and debt issuance cost related to all borrowings for the three months ended March 31, 2022 and 2021 were as follows (in thousands):

	Three Months Ended March 31,
	2022		2021
Amortization of debt discount	$	106	$	60
Amortization of debt issuance cost		363		124