Note 5 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

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

	March 31, 2020						December 31, 2019
(in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Financial Assets:
Cash and cash equivalents
Money market mutual fund	$	31,291	$	-	$	-	$	68,962	$	-	$	-
Total	$	31,291	$	-	$	-	$	68,962	$	-	$	-