Sale of Property (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	0 Months Ended
Sep. 30, 2014	Apr. 07, 2014 Fremont, NC
Sales Price		$ 850
Less:
Transaction costs		75
Land		140
Building and Equipment (gross book value)		1,715
Building and Equipment - accum. Depreciation		1,580
Building and Equipment (net book value)		135
Environmental Remediation Liability		300
Gain on Sale	$ 200	$ 200

Accumulated depreciation related to buldings and equipment sold.

No definition available.

Name:	ACU_BuildingAndEquipmentDisposalsAccumDepreciation
Namespace Prefix:	ACU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Gross book value of buildings and equipment sold.

+ References

No definition available.

+ Details

Name:	ACU_BuildingAndEquipmentDisposalsGross
Namespace Prefix:	ACU_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Net book value of building and equipment sold in transaction.

+ References

No definition available.

+ Details

Name:	ACU_BuildingAndEquipmentDisposalsNet
Namespace Prefix:	ACU_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	ACU_GainOnSaleAdjustmentsAbstract
Namespace Prefix:	ACU_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Book value of land sold in transaction.

+ References

No definition available.

+ Details

Name:	ACU_LandDisposals
Namespace Prefix:	ACU_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Proceeds from sale of property, plant and equipment.

+ References

No definition available.

+ Details

Name:	ACU_PropertyPlantAndEquipmentDisposalsSaleProceeds
Namespace Prefix:	ACU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Transaction costs associated with sale of property, plant and equipment.

+ References

No definition available.

+ Details

Name:	ACU_PropertyPlantAndEquipmentDisposalsTransactionCosts
Namespace Prefix:	ACU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount of the liability for remediation of environmental damage pertaining to assets or businesses previously disposed.

+ 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.Q4)

-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section Y

-Paragraph Question 4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration