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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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Revenue $ 24,851 $ 29,483 $ 55,402 $ 57,962
Americas [Member]        
Revenue 14,942 17,511 33,278 33,886
EMEA [Member]        
Revenue 7,950 10,014 18,300 20,027
Asia Pacific [Member]        
Revenue $ 1,959 $ 1,958 $ 3,824 $ 4,049