Note 5 - Goodwill and Other Intangible Assets - Estimated Fair Values Over Carrying Value, Including Goodwill (Details) - Europe [Member]	Dec. 31, 2023
Power Solutions and Protection Segment [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	89.10%
Cinch Connectivity Solutions Segment [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	79.90%
EOS Power Panama Inc. [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	71.20%
CUI Power [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	169.40%