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Patents and Other Intangible Assets - Summary (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Patents	$ 1,646,000	$ 1,614,000
Trademarks	130,000	128,000
Other	8,000	8,000
Patents and other intangible assets	1,784,000	1,750,000
Accumulated amortization	(486,000)	(448,000)
Finite-Lived Intangible Assets, Net	1,298,000	1,302,000
Patents Pending [Member]
Patents	763,000	731,000
Issued Patents [Member]
Patents	883,000	883,000
Trademarks Pending [Member]
Trademarks	107,000	105,000
Registered Trademarks [Member]
Trademarks	$ 23,000	$ 23,000

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Name Accounting Standards Codification
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