Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease expense	$ 380	$ 378
Short-term lease expense	0	0
Variable lease expense	117	108
Sublease income	0	0
Total	$ 497	$ 486