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Contingencies - Accrual for Environmental Remediation (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014
Environmental remediation accrual at December 31, 2013 | $ 39,044 us-gaap_AccrualForEnvironmentalLossContingencies
Estimated Costs | 300,000 us-gaap_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForAcquisitionsAndDivestitures
Payments | (57,000)us-gaap_AccrualForEnvironmentalLossContingenciesPayments
Environmental remediation accrual at December 31, 2014 | 265,876 us-gaap_AccrualForEnvironmentalLossContingencies
Fremont, NC |
Environmental remediation accrual at December 31, 2013 | 0 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionAMember
Estimated Costs | 300,000 us-gaap_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForAcquisitionsAndDivestitures / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionAMember
Payments | (40,000)us-gaap_AccrualForEnvironmentalLossContingenciesPayments / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionAMember
Environmental remediation accrual at December 31, 2014 | 260,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionAMember
Bridgeport, CT |
Environmental remediation accrual at December 31, 2013 | 39,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionBMember
Payments | (33,000)us-gaap_AccrualForEnvironmentalLossContingenciesPayments / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionBMember
Environmental remediation accrual at December 31, 2014 | $ 6,000 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = ACU_SignificantAcquisitionsAndDisposalsTransactionBMember

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The Increase or Decrease in the accrual for environmental loss contingencies in the period arising from business acquisitions or divestitures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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- Definition The aggregate amount disbursed during the reporting period to settle environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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