Note 5 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

		*March 31, 2023*												*December 31, 2022*
(in thousands)		*Level 1*				*Level 2*				*Level 3*				*Level 1*				*Level 2*				*Level 3*
Financial Assets:
Cash		$	50,165			$	-			$	-			$	38,862			$	-			$	-
Money market mutual fund			11,886				-				-				17,696				-				-
Marketable securities			11,344				31,331				-				9,881				40,106				-
Total		$	73,395			$	31,331			$	-			$	66,439			$	40,106			$	-