Note 3 - Cash, Cash Equivalents, and Restricted Cash 1 (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2024

Dec. 31, 2023

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

	June 30, 2024		December 31, 2023
	(unaudited)
Cash and cash equivalents	$	11,215	$	16,932
Restricted cash		2,150		2,150
Total cash, cash equivalents, and restricted cash	$	13,365	$	19,082

	As of December 31,
	2023		2022
Cash and cash equivalents	$	16,932	$	19,064
Restricted cash		2,150		2,150
Total cash, cash equivalents, and restricted cash	$	19,082	$	21,214