Note 3 - Revenue - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues	$ 7,988	$ 8,017	$ 20,736	$ 19,920
UNITED STATES
Revenues	5,640	6,972	15,937	14,939
Latin America [Member]
Revenues	157	56	310	185
Europe [Member]
Revenues	1,001	613	2,400	1,939
Asia [Member]
Revenues	1,190	376	2,089	2,857
Non-US [Member]
Revenues	$ 2,348	$ 1,045	$ 4,799	$ 4,981