The Company’s leases relate primarily to office facilities that expire on various dates from 2020 through 2029. The terms of the Company's non-cancelable operating lease arrangements typically contain fixed lease payment which increases over the term of the lease at fixed rates, rent holidays and provide for additional renewal periods. Lease expense is recognized over the term of the lease on a straight-line basis. All of the Company’s leases are classified as operating leases. The Company has determined that periods covered by options to extend the Company’s leases are excluded from the lease term as the Company is not reasonably certain the Company will exercise such options. Operating lease expense, including expenses related to short-term leases, were $1.5 million and $1.2 million for the three months ended September 30, 2020 and 2019, respectively. Operating lease expense, including expenses related to short-term leases, were $4.5 million and $3.5 million for the nine months ended September 30, 2020 and 2019, respectively.

The Company records its right-of-use (“ROU”) asset within other assets (long term) and its operating lease liabilities within other current and long-term liabilities.

Additional information related to the Company’s leases is as follows (in thousands, except lease term and discount rate):

	As of			As of
	September 30, 2020			December 31, 2019
Balance sheet information
ROU assets	$	15,940		$	13,071
Lease liabilities, current	$	4,354		$	3,567
Lease liabilities, non-current		15,209			11,823
Total lease liabilities	$	19,563		$	15,390
Supplemental data
Weighted average remaining lease term	4.72 years			4.11 years
Weighted average discount rate		7.00	%		7.00	%

	Nine Months Ended September 30,
	2020		2019
Cash paid for amounts included in lease liabilities	$	3,615	$	2,648
ROU assets obtained in exchange for new lease obligations		5,648		17,726

Maturities of lease liabilities as of September 30, 2020 were as follows (in thousands):

Year ending December 31,
2020 (for the remaining three months)	$	1,349
2021		5,410
2022		5,129
2023		5,010
2024		2,563
Thereafter		3,661
Total undiscounted lease payments		23,122
Less: imputed interest		(3,559	)
Total lease liabilities	$	19,563

	Three Months Ended September 30,						Nine Months Ended September 30,
	2020			2019			2020			2019
Operating lease expense	$	1,273		$	1,069		$	3,698		$	2,802
Short-term lease expense⁽¹⁾		266			138			818			690
		1,539			1,207			4,516			3,492
Less: Sublease income		(98	)		(33	)		(236	)		(45	)
Total lease expense	$	1,441		$	1,174		$	4,280		$	3,447

As of September 30, 2020, the Company does not have any leases that have not yet commenced that create significant rights and obligations.