Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Summary of Long Term Debt

Long-term debt consisted of the following:

(in thousands)	March 31, 2022		December 31, 2021
Principal amount of long-term debt	$	32,500	$	32,500
Debt discount, net of accretion	127		277
Cumulative accretion of end of term payments	597		1,157
Long-term debt	$	33,224	$	33,934
Less: current portion of long-term debt	$	(3,415)	$	(795)
Long-term debt, net of current portion	$	29,809	$	33,139

Interest Income and Interest Expense Disclosure

The Company recognized interest expense under the Hercules Loan Agreement as follows:

(in thousands)	For the Three Months ended March 31,
	2022		2021
Total interest expense	$	909	$	890
Non-cash interest expense	$	198	$	178

Schedule of Future Principal Payments and the Final Payments Due

As of March 31, 2022, future principal and end-of-term payments due under the Hercules Loan Agreement were as follows (in thousands):

Year Ending December 31,	Total
2022	$	—
2023	19,802
2024	13,295
Long-term debt	$	33,097