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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Our lease expense comprises of the following (in thousands):

The balance sheet classification of our operating lease liabilities was as follows (in thousands):

	December 31, 2020		December 31, 2019
Operating lease liabilities:
Current portion of lease liabilities (included in other current liabilities)	$	3,247	$	3,039
Long-term portion of lease liabilities		34,789		37,845
Total operating lease liabilities	$	38,036	$	40,884

At December 31, 2020, the maturities of our sublease income and operating lease liabilities were as follows (in thousands):

Years ending December 31,	Sublease Income		Operating Lease Liabilities
2021	$	5,201	$	6,942
2022		5,357		6,268
2023		5,518		5,403
2024		5,684		5,547
2025		5,854		5,696
Thereafter		33,742		30,760
Total	$	61,356		60,616
Less:
Present value adjustment				(22,580	)
Total			$	38,036

The weighted average remaining lease term and the weighted average discount rate used to determine the operating lease liability were as follows:

	December 31, 2020			December 31, 2019
Weighted average remaining lease term	9.1 years			9.7 years
Weighted average discount rate		10.1	%		10.1	%