Leases - Lease Cost (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) lease_arrangement	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Number of lease arrangements | lease_arrangement	7
Operating lease cost	$ 88	$ 172
Short-term lease cost	3	68
Total lease cost	$ 91	$ 240
Weighted average remaining lease term	4 years 4 months 21 days
Weighted average discount rate	3.66%
Minimum
Lessee, Lease, Description [Line Items]
Term of lease	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of lease	6 years