Major Customer and Geographic Information (Schedule of Revenue by Geographic Region) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 513,900	$ 627,300	$ 1,125,300	$ 1,147,600
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	141,200	107,000	310,900	290,400
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,600	0	4,100	1,400
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	362,100	505,100	775,600	840,600
AUSTRALIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 8,000	$ 15,200	$ 34,700	$ 15,200