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Note 1 - Organization and Basis for Presentation - Disaggregation of Revenue by Major 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 $ 38,368 $ 36,416 $ 114,921 $ 91,818
Americas [Member]        
Revenue 25,299 24,184 76,327 57,462
EMEA [Member]        
Revenue 10,535 10,039 31,200 28,339
Asia Pacific [Member]        
Revenue $ 2,534 $ 2,193 $ 7,394 $ 6,017