Line of credit facility fee percentage.

No definition available.

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Namespace Prefix:	acu_
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Period Type:	duration

- Definition

Long term debt and stockholders equity.

+ References

No definition available.

+ Details

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- Definition

Cash payment for settlement of stock options.

+ References

No definition available.

+ Details

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Namespace Prefix:	acu_
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

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
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Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Period Type:	instant

- 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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- 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ 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 YYYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

+ 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

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 10
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- Details

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Debt and Shareholders' Equity (Details Narrative) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	May 30, 2022	Dec. 31, 2021
Long Term Debt And Stockholders Equity [Line Items]
Aggregate proceeds from exercise of employee stock options		$ 10,000		$ 10,000
Cash settlement of stock options				$ 108,000	$ 211,000
Common Stock
Long Term Debt And Stockholders Equity [Line Items]
Issuance of common stock (shares)		727	172,594	727	190,295
HSBC Bank
Long Term Debt And Stockholders Equity [Line Items]
Credit facility borrowing capacity	$ 65,000,000					$ 50,000,000
Credit facility interest rate	SOFR plus 1.75%
Credit facility expiration date	May 31, 2026
Facility fee per annum	0.125%
Outstanding borrowings under revolving loan agreement		$ 50,263,000		$ 50,263,000			$ 33,037,000
HSBC Bank \| SOFR
Long Term Debt And Stockholders Equity [Line Items]
Interest rate	1.75%
First Aid Only Distribution Center
Long Term Debt And Stockholders Equity [Line Items]
Covenant terms and compliance				Under the revolving loan agreement, the Company is required to maintain specific amounts of funded debt to EBITDA, a fixed charge coverage ratio and must have annual net income greater than $0, measured as of the end of each fiscal year. As of June 30, 2022, the Company was in compliance with the covenants then in effect under the loan agreement
Fixed interest rate		3.80%		3.80%
Mortgage maturity date				December 1, 2031