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v3.20.1

Segment Information (Details Narrative) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Segment Information Details Narrative [Abstract] |  |
Direct import sales to total net sales ratio | 14.00% | 12.00%

X
- Definition Percentage of direct import sales to total net sales. + References No definition available. + Details
Name: | acu_DirectImportSalesToTotalNetSalesPercentage
Namespace Prefix: | acu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Segment information details narrative. + References No definition available. + Details
Name: | acu_SegmentInformationDetailsNarrativeAbstract
Namespace Prefix: | acu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration