Note 3 - Cash, Cash Equivalents and Short-term Investments (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

	June 30, 2020		December 31, 2019
Cash	$	6,128	$	4,092
Cash equivalents (see detail in Note 4)		5,854		3,620
Restricted cash		600		600
Total cash and cash equivalents		12,582		8,312
Short-term investments (see detail in Note 4)		—		2,249
Total cash, cash equivalents and short-term investments	$	12,582	$	10,561