Leases (Lease cost) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 155	$ 294
Total lease cost	155	294
Cash paid for amounts included in the measurement of lease liabilities	$ 144	$ 287