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Note 19 - Segment Information - Identifiable Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Identifiable Assets $ 103,905 $ 62,030
Corporate, Non-Segment [Member]    
Identifiable Assets 10,123 1,581
Thermal Testing Products [Member]    
Identifiable Assets 67,531 50,782
EMS [Member]    
Identifiable Assets $ 26,251 $ 9,667