Leases (Schedule of Supplemental Cash Flow Information Related to Leases) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Cash payments
Operating cash flows from operating leases	$ (190)	$ 1,076	$ (148)	$ 3,228
Operating cash flows from finance leases	1,164	(628)	2,328	(1,258)
Financing cash flows from finance leases	$ (111)	$ (111)	$ (333)	$ (333)