Leases - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Total leased assets	$ 1,258
Total leased liabilities	$ 1,335
ASU 842
Lessee, Lease, Description [Line Items]
Total leased assets		$ 1,100
Total leased liabilities		$ 1,100