Note 13 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues	$ 1,165	$ 1,934	$ 2,764	$ 3,476
Americas [Member]
Revenues	1,090	1,123	2,285	1,750
Europe, Middle East and Africa [Member]
Revenues	73	803	247	1,679
Asia Pacific [Member]
Revenues	$ 2	$ 8	$ 232	$ 47