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

3 Months Ended

Mar. 31, 2021

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

	March 31, 2021		December 31, 2020
Cash	$	3,914	$	6,509
Cash equivalents (see detail in Note 4)		6,114		6,114
Restricted cash		337		337
Total cash and cash equivalents		10,365		12,960