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Leases (Tables)
 6 Months Ended
Jun. 30, 2021
Leases [Abstract]  
Summary of Additional Details of Leases
The following table provides additional details of our facility leases presented in the condensed balance sheet as of June 30, 2021 (dollars in thousands):
Facilities
Right-of-use assets$14,519
Current portion of lease liabilities3,184
Operating lease liability, net of current portion11,548
Total$14,732
Weighted-average remaining life (years)3.90
Weighted-average discount rate6.87 %
Summary of Lease Costs
Lease costs, which are included in operating expenses in our statements of operations, were as follows (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Operating lease expense$837 $648 $1,510 $1,296 
Cash paid for operating leases$766 $761 $1,554 $1,521 
Summary of Undiscounted Cash Payment Obligations for Operating Lease Liabilities
The following table summarizes our undiscounted cash payment obligations for our operating lease liabilities as of June 30, 2021 (in thousands):
Remainder of 2021$1,978 
20224,292 
20234,440 
20244,589 
20251,321 
Thereafter252 
Total undiscounted operating lease payments16,872 
Imputed interest expenses(2,140)
Total operating lease liabilities14,732 
Less: Current portion of operating lease liability(3,184)
Operating lease liability, net of current portion$11,548