Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 409	$ 257	$ 728	$ 450
Variable lease cost	109	13	147	40
Short-term lease cost	0	0	0	0
Interest on lease liabilities	26	28	52	57
Amortization of right-of-use assets	24	24	48	48
Net lease cost	568	322	975	595
Operating cash flows from operating leases	651	455	1,154	838
Operating cash flows from finance lease	26	41	52	83
Finance cash flows from finance lease	31	28	62	55
Right-of-use assets obtained in exchange for new operating lease liabilities	94	1,599	94	1,599
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0	$ 0	$ 0	$ 0