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Leases (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Schedule of Components of Lease Expense The components of lease expense included in research and development and general and administrative expenses in the statement of operations were as follows:
Years ended December 31,
(in thousands)202220212020
Operating lease cost$3,793 $3,502 $2,755 
Finance lease cost:
Amortization of right-of-use assets$194 $169 $101 
Interest on lease liabilities28 28 21 
$222 $197 $122 
Schedule of Supplemental Balance Sheet Information Related to Leases Supplemental balance sheet information related to leases was as follows:
Year ended December 31,
20222021
Operating leases:
Operating lease right-of-use assets$10,475 $12,889 
Operating lease liabilities, current$2,798 $2,303 
Operating lease liabilities$8,575 $11,247 
Finance leases:
Property and equipment, gross$1,038 $1,038 
Property and equipment, accumulated depreciation$(539)$(345)
Other liabilities, current$240 $239 
Other liabilities$203 $449 
Weighted-average remaining lease term:
Operating leases3.3 years4.3 years
Finance leases2.0 years4.0 years
Weighted-average discount rate:
Operating leases10.8 %10.8 %
Finance leases5.4 %5.4 %
Schedule of Supplemental Cash Flow Information Related to Leases Supplemental cash flow information related to leases was as follows:
Year ended December 31,
(in thousands)20222021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$3,865 $3,241 
Operating cash flows from finance leases$28 $28 
Financing cash flows from finance leases$272 $215 
Schedule of Future Minimum Payments Under Operating Leases Future minimum lease payments under non-cancellable leases as of December 31, 2022 were as follows:
(in thousands)Operating leasesFinance leases
2023$3,857 $262 
20244,146 141 
20254,187 48 
20261,310 8 
2027 and thereafter— — 
Total lease payments13,500 459 
Present value adjustment(2,127)(15)
Present value of lease liabilities$11,373 $444 
Schedule of Future Minimum Payments on Finance Leases Future minimum lease payments under non-cancellable leases as of December 31, 2022 were as follows:
(in thousands)Operating leasesFinance leases
2023$3,857 $262 
20244,146 141 
20254,187 48 
20261,310 8 
2027 and thereafter— — 
Total lease payments13,500 459 
Present value adjustment(2,127)(15)
Present value of lease liabilities$11,373 $444