Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Schedule of Lease Costs

Lease costs were comprised of the following (in thousands):

	Three months ended September 30, 2019		Nine months ended September 30, 2019
Operating lease cost	$	753	$	2,258
Variable lease cost		374		1,126
Short-term lease cost		13		42
Total lease cost	$	1,140	$	3,426

Schedule of Gross Future Minimum Annual Rental Commitments

Gross future minimum annual rental commitments as of September 30, 2019, were as follows (in thousands):

	Undiscounted Rent Payments
Year ending December 31,
2019 (remaining 3 months)	$	739
2020		3,038
2021		3,127
2022		3,220
2023		1,694
2024		1,745
Total undiscounted rent payments	$	13,563
Present value discount		(1,930	)
Present value	$	11,633
Current portion of operating lease liability (included as a    component of accrued expenses)	$	2,291
Noncurrent operating lease liabilities		9,342
Total operating lease liability	$	11,633

Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases

Future minimum lease payments under non-cancelable operating leases at December 31, 2018 were as follows (in thousands):

Years ending December 31,
2019	$	2,944
2020		3,035
2021		3,123
2022		3,216
2023		1,690
Thereafter		1,741
	$	15,749