Note 3 - Revenue - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues	$ 8,017	$ 7,559	$ 19,920	$ 17,810
UNITED STATES
Revenues	6,972	6,049	14,939	15,100
Latin America [Member]
Revenues	56	121	185	338
Europe [Member]
Revenues	613	663	1,939	1,339
Asia [Member]
Revenues	376	726	2,857	1,033
Non-US [Member]
Revenues	$ 1,045	$ 1,510	$ 4,981	$ 2,710