Note 3 - Revenue - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 5,461	$ 6,368	$ 12,748	$ 11,903
UNITED STATES
Revenues	4,316	4,279	10,297	7,967
Latin America [Member]
Revenues	153	60	153	129
Europe [Member]
Revenues	820	922	1,399	1,326
Asia [Member]
Revenues	172	1,107	899	2,481
Non-US [Member]
Revenues	$ 1,145	$ 2,089	$ 2,451	$ 3,936