Note 11 - Marketable Securities

3 Months Ended

Mar. 31, 2022

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

Note 11.  Marketable Securities

	March 31, 2022						December 31, 2021
			Unrealized		Fair				Unrealized		Fair
	Cost		Gains (Losses)		Value		Cost		Gains (Losses)		Value
Certificates of deposit - Current marketable securities	$	19	$	—	$	19	$	17	$	—	$	17

Certificates of deposit maturing in one year or less total $19 at  March 31, 2022.