Leases - Components of Lease Costs (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 costs	$ 606	$ 247	$ 2,195	$ 674
Amortization expense related to right-of-use assets	183	80	539	239
Interest expense for financing lease liabilities	29	4	94	16
Variable lease costs	216	103	431	286
Total lease costs	$ 1,034	$ 434	$ 3,259	$ 1,215