Note 9 - Interest Expense and Other - Schedule of Interest Expense and Other Nonoperating Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Common stock purchase agreements costs	$ 1,136	$ 0	$ 1,136	$ 0
Amortization of premiums (accretion of discounts) on marketable securities, net	(149)	(1)	(590)	(230)
Expected credit losses	1	0	35	0
Loss on disposal of assets	0	105	0	105
Impairment of right-of-use assets	0	0	0	47
Realized loss on instrument-specific credit risk	0	46	0	46
Other	114	24	148	41
Interest expense and other	$ 1,102	$ 174	$ 729	$ 9