PATENTS (Tables)

12 Months Ended

Dec. 31, 2020

PATENTS

Accumulated amortization related to acquired intangible assets

	2020			2019
Gross carrying amount	$	7,848,000		$	7,797,000
Accumulated amortization		(6,270,000	)		(5,978,000	)
Patents, net	$	1,578,000		$	1,819,000

Future amortization of current intangible assets, net

For the years ended December 31,
	2021	$	294,000
	2022		294,000
	2023		230,000
	2024		83,000
	2025 and thereafter		677,000
	Total	$	1,578,000