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Patents and Other Intangible Assets - Summary (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Patents	$ 1,465,000	$ 1,963,000
Trademarks	100,000	78,000
Other	8,000	8,000
Patents and other intangible assets	1,573,000	2,049,000
Accumulated amortization	(288,000)	(290,000)
Finite-Lived Intangible Assets, Net	1,285,000	1,759,000
Patents Pending [Member]
Patents	846,000	1,202,000
Issued Patents [Member]
Patents	619,000	761,000
Trademarks Pending [Member]
Trademarks	77,000	55,000
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.

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