Leases - Supplemental Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases (cash payments)	$ 238	$ 151
Operating cash flows from operating leases (lease liability reduction)	226	138
Operating lease right-of-use assets obtained in exchange for leases entered into during the period	$ 196	$ 676