Major Customer and Geographic Information (Schedule of Revenue by Geographic Region) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 409,400	$ 425,400
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	216,600	184,900
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		1,500
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 192,800	$ 239,000