Note 5 - Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31, 2022									December 31, 2021
	Weighted Average Amortization Period (Years)		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization Period (Years)		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Patents and Trademarks		1.0	$	474,000	$	(473,000	)	$	1,000		2.0	$	474,000	$	(471,000	)	$	3,000