Amount of repatriated foreign earnings used to repay debt.

No definition available.

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

- Definition

Facility fee, expressed as a percentage of the average daily unused portion of the revolving credit line.

+ References

No definition available.

+ Details

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Namespace Prefix:	ACU_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash payment for settlement of stock options.

+ References

No definition available.

+ Details

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

- Definition

Variable rate mortgage interest rate description.

+ References

No definition available.

+ Details

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

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
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-Section 30
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-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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Debt and Shareholders' Equity (Details Narrative) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Oct. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Outstanding borrowings under revolving loan agreement		$ 41,100		$ 43,450
Credit facility borrowing capacity		$ 50,000
Interest rate of LIBOR plus percentage		2.00%
Credit facility interest rate		Interest rate of LIBOR plus 2.0%
Facility fee per annum		0.20%
Credit facility expiration date		May 06, 2019
Repatriated earnings used to repay revolving loan agreement		$ 5,800
Cash paid to settle employee stock options		$ 45	$ 231
First Aid Only Distribution Center
Interest rate of LIBOR plus percentage	2.50%
Purchase price	$ 4,000,000
Variable rate mortgage interest rate	Interest rate of LIBOR plus 2.5%
Monthly payment	$ 22,222
Mortgage maturity date	Oct. 31, 2024