Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Elements of Lease Expense

The elements of the lease expense were as follows (in thousands):

	Three Months Ended September 30, 2019			Nine Months Ended September 30, 2019
Lease cost
Operating lease cost	$	443		$	1,329
Variable lease cost (1)		254			835
Total lease cost	$	697		$	2,164
Other information
Operating cash flows used for operating leases	$	2,240
Remaining lease term	3.58 years
Discount rate		6.25	%

(1) The variable lease costs for the quarter ended September 30, 2019 include common area maintenance and other operating charges.

Summary of Future Minimum Payments under Operating Lease

The following table summarizes the future minimum payments due under the operating lease as of September 30, 2019 (in thousands):

Year Ending December 31,
2019	$	474
2020		1,933
2021		1,989
2022		2,046
2023		689
Total future minimum lease payments		7,131
Less: imputed interest		719
Total operating lease liability	$	6,412
Included in the consolidated balance sheet:
Current operating lease liability	$	1,581
Operating lease liability, net of current portion		4,831
Total operating lease liability	$	6,412

Summary of Future Minimum Lease Payments Due under Operating Lease

As previously disclosed in our 2018 Annual Report on Form 10-K, future minimum lease payments under the operating lease as of December 31, 2018 were as follows (in thousands):

Year Ending December 31,
2019	$	1,878
2020		1,933
2021		1,989
2022		2,046
2023		689
	$	8,535