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Income Taxes (Details Narrative) | 12 Months Ended
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Dec. 31, 2019
Hong Kong |
Hong Kong income tax rate | 16.50%

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- Definition Income tax rate charged in foreign jurisdiction. + References No definition available. + Details
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Namespace Prefix: | acu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_StatementGeographicalAxis=acu_ReportableSegmentsDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |