Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Patents [Member]

Schedule of Patent Cost and Other Asset

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