Note 14 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues	$ 3,631	$ 1,701	$ 5,544	$ 4,464
Americas [Member]
Revenues	1,347	1,478	3,225	3,484
Europe, Middle East and Africa [Member]
Revenues	2,284	220	2,320	435
Asia Pacific [Member]
Revenues	$ 0	$ 3	$ (1)	$ 545