Note 11 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Marketable Securities [Table Text Block]

	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