Leases - (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) ft² Lease	Dec. 31, 2018 USD ($)
Leases [Abstract]
Number of operating leases | Lease	4
Area under lease | ft²	134,296
Lease cost	$ 6,004
Rent expense	$ 4,900	$ 4,800