Note 3 - Revenue - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 7,490	$ 7,851	$ 19,430	$ 19,850
UNITED STATES
Revenues	5,626	5,453	15,427	13,519
Latin America [Member]
Revenues	166	208	579	816
Europe [Member]
Revenues	698	785	1,882	1,627
Africa [Member]
Revenues	68	741	262	2,443
Asia [Member]
Revenues	932	664	1,280	1,445
Non-US [Member]
Revenues	$ 1,864	$ 2,398	$ 4,003	$ 6,331