Note 3 - Cash, Cash Equivalents and Restricted Cash (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

	September 30, 2021		December 31, 2020
Cash	$	3,925	$	6,509
Cash equivalents (see detail in Note 4)		37,105		6,114
Restricted cash		337		337
Total cash and cash equivalents		41,367		12,960