Note 4 - Short-term Investments (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

Debt Securities, Held-to-Maturity [Table Text Block]

	Amortized Cost Basis		Gross Unrealized Gains/(Losses)		Fair Value
As of September 30, 2022
U.S. treasury bills	$	3,494	$	-	$	3,494