Lease Commitments (Schedule of components of operating lease expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Lease Commitments [Abstract]
Operating lease cost	$ 646
Operating lease cost		$ 687
Short-term lease cost	76
Short-term lease cost		122
Variable lease cost	176
Variable lease cost		152
Total operating lease cost	$ 898
Total operating lease cost		$ 961