Leases - ROU Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Operating	$ 2,024
Finance	4,047
Total ROU Assets	6,071
Current
Operating	1,558
Finance	1,470	$ 3,231
Noncurrent
Operating	445
Finance	919
Total Lease Liabilities	4,392
Future operating lease payments, remainder of 2019	900
Future operating lease payments, 2020	1,100
Accumulated amortization	$ 1,000