Note 3 - Revenue - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues	$ 5,558	$ 7,042	$ 11,940	$ 11,999
UNITED STATES
Revenues	4,442	4,471	9,801	8,066
Latin America [Member]
Revenues	65	293	413	608
Europe [Member]
Revenues	707	1,252	1,184	842
Africa [Member]
Revenues	156	436	194	1,702
Asia [Member]
Revenues	188	590	348	781
Non-US [Member]
Revenues	$ 1,116	$ 2,571	$ 2,139	$ 3,933