Commitments and Contingencies Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lease Costs
Lease, Cost	$ 184	$ 361
Short-term Lease, Cost	47	124
Finance Lease, Right-of-Use Asset, Amortization	89	146
Operating Lease, Expense	$ 48	$ 91