Major Customer and Geographic Information (Schedule of Revenue by Geographic Region) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 516,100	$ 1,873,700	$ 925,500	$ 2,299,100
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	225,800	1,674,400	442,400	1,859,300
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues				1,500
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	100	100	100	100
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 290,200	$ 199,200	$ 483,000	$ 438,200