Leases (Schedule of Operating Lease Expense) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	[1]	Jun. 30, 2019	Jun. 30, 2018	[1]
Lessee Disclosure [Abstract]
Operating lease expense	$ 204			$ 408
Short-term lease expense	37			73
Total lease expense	241			481
Cash paid for amounts included in lease liabilities	$ 197			$ 393

[1] Not reportable