Facility Lease (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Elements of lease expense

	Three Months Ended
	March 31,
	2019		2018
Operating lease cost
Base rent expense	$	249	$	177
Common area maintenance		81		75
Total operating lease cost	$	330	$	252
Other Information
Operating cash flows used for operating lease	$	359	$	356
Operating lease liabilities arising from obtaining right-of-use asset		3,769		—
Remaining lease term		3.8 years		2.8 years
Discount rate		10.0%		—

Minimum rental commitments

As of March 31, 2019, minimum rental commitments under this lease are as follows (in thousands):

Year Ended December 31 (in thousands)
2019*	$	845
2020		1,159
2021		1,260
2022		1,299
Total lease payments	$	4,563
Less: imputed interest		(794)
Total	$	3,769

* Remainder of the year

Schedule of future minimum lease payments under Topic 840

As of December 31, 2018, minimum rental commitments under this lease are as follows (in thousands):

Year Ended December 31 (in thousands)
2019	$	1,110
2020		1,142
2021		1,251
2022		1,296
2023		109
Total	$	4,908