Leases - Summary of Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 382	$ 532	$ 1,228	$ 1,592
Variable lease cost	90	90	403	258
Operating lease expense	472	622	1,631	1,850
Short-term lease rent expense	4	4	12	12
Total rent expense	476	626	1,643	1,862
Operating cash flows from operating leases	393	494	1,248	1,532
Right of use assets exchanged for operating lease liabilities	$ 0	$ 136	$ 0	$ 4,442
Weighted-average remaining lease term – operating leases	2 years 3 months 18 days	1 year 9 months 18 days	2 years 3 months 18 days	1 year 9 months 18 days
Weighted-average discount rate – operating leases	6.80%	6.80%	6.80%	6.80%