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Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

7.  INTANGIBLE ASSETS

Patent costs, which are included in Other assets in the accompanying Consolidated Balance Sheets, as of December 31 were as follows (in thousands):

		2021				2020
Patent costs		$	1,686			$	1,859
Accumulated amortization			(1,354	)			(1,434	)
		$	332			$	425

Definite lived intangible assets, such as patent rights, are amortized and tested for impairment if a triggering event occurs.

Amortization expense was approximately $96,000, $106,000 and $108,000 in 2021, 2020 and 2019, respectively.

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- References

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- Definition

The entire disclosure for goodwill and intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-URI http://asc.fasb.org/topic&trid=2144416

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