Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Debt

Long-term debt consisted of the following:

(in thousands)	December 31, 2020		December 31, 2019
Principal amount of long-term debt	$	32,500	$	20,000
Debt premium (discount), net of accretion	223		(317)
Cumulative accrual of end of term payments	455		414
Long-term debt, including discount and accrued end of term payments	$	33,178	$	20,097

Schedule of Maturities of Long-term Debt

As of December 31, 2020, future principal payments and the final payment due under the Second Amended Loan Agreement were as follows (in thousands):

Year Ending December 31	Total
2021	$	—
2022	—
2023	21,185
2024	11,315
Long-term debt	$	32,500