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Note 12 - Geographic Information and Major Customer and Product Data - Information About Products and Services (Details) - Revenue Benchmark [Member] - Product Concentration Risk [Member]
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Connectivity Products [Member]      
Percentage of total revenues 81.00% 84.00% 78.00%
Smart Sensing Products [Member]      
Percentage of total revenues 19.00% 16.00% 22.00%