Lease (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lessee Disclosure [Abstract]
Amortization of right-of-use assets	$ 474	$ 356	$ 947	$ 712
Interest on lease liabilities	208	179	423	363
Operating lease cost	998	994	2,124	2,144
Short-term lease cost	116	48	222	97
Variable lease cost	472	645	1,070	1,369
Total lease cost	2,268	2,222	4,786	4,685
Cash flows from leases
Operating cash flows from finance leases	208	179	423	363
Operating cash flows from operating leases	998	994	2,124	2,144
Financing cash flows from finance leases	$ 364	$ 255	$ 720	$ 505