Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 319	$ 193
Variable lease cost	39	35
Short-term lease cost	0	1
Interest on lease liabilities	26	29
Amortization of right-of-use assets	24	24
Net lease cost	408	282
Operating cash flows from operating leases	503	359
Operating cash flows from finance lease	27	29
Finance cash flows from finance lease	31	27
Right-of-use assets obtained in exchange for new operating lease liabilities	0	0
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0	$ 0