Leases - Components of Lease Expense (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 expense	$ 191	$ 197	$ 570	$ 575
Variable lease expense	51	7	169	115
Total	$ 242	$ 204	$ 739	$ 690