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Note 10 - Revenues - Deferred Revenue (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Deferred revenue $ 3,642 $ 4,266
Service [Member]    
Deferred revenue 1,642 1,976
Customer Advances [Member]    
Deferred revenue $ 2,000 $ 2,290