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Patents and Other Intangible Assets - Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Patents	$ 1,016	$ 1,614
Trademarks	97	128
Other	8	8
Patents and other intangible assets	1,121	1,750
Accumulated amortization	(322)	(448)
Finite-Lived Intangible Assets, Net	799	1,302
Patents Pending
Patents	439	731
Issued Patents
Patents	577	883
Trademarks Pending
Trademarks	3	105
Registered Trademarks
Trademarks	$ 94	$ 23

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- Definition

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

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Gross carrying amount before accumulated amortization as of the balance sheet date of the costs pertaining to the exclusive legal rights granted to the owner of the patent to exploit an invention or a process for a period of time specified by law. Such costs may have been expended to directly apply and receive patent rights, or to acquire such rights.

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