Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies - Revenue From Unaffiliated Customers by Geographic Area (Details)

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Note 2 - Summary of Significant Accounting Policies - Revenue From Unaffiliated Customers by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue $ 1,616 $ 1,524 $ 4,720 $ 3,532
North America [Member]        
Revenue 939 845 2,857 1,648
Asia Pacific [Member]        
Revenue 677 679 1,855 1,865
Europe And Middle East [Member]        
Revenue 0 0 8 5
Latin America [Member]        
Revenue $ 0 $ 0 $ 0 $ 14