Basis of Presentation	3 Months Ended
Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying condensed consolidated financial statements include all adjustments necessary to present fairly the financial position, results of operations and cash flows of Acme United Corporation (the “Company”). These adjustments are of a normal, recurring nature. However, the financial statements do not include all the disclosures normally required by accounting principles generally accepted in the United States of America or those normally made in the Company's Annual Report on Form 10-K. Please refer to the Company's Annual Report on Form 10-K for the year ended December 31, 2020 for such disclosures. The condensed consolidated balance sheet as of December 31, 2020 was derived from the audited consolidated balance sheet as of that date. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the financial statements and notes thereto included in the Company’s 2020 Annual Report on Form 10-K. The Company has evaluated events and transactions subsequent to March 31, 2021 and through the date these condensed consolidated financial statements were issued. Recently Issued and Adopted Accounting Standards In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The update eliminates, clarifies and modifies certain guidance related to the accounting for income taxes. ASU 2019-12 is effective for annual reporting periods beginning after December 15, 2020, i.e. commencing with our current fiscal year. The adoption of ASU 2019-12 did not have a material effect on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendments in this update eliminate Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects from any tax-deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The Company adopted this standard on January 1, 2020. The adoption of this standard has not had an impact to the financial statements of the Company.

Basis of Presentation

3 Months Ended

Mar. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

1. Basis of Presentation

The accompanying condensed consolidated financial statements include all adjustments necessary to present fairly the financial position, results of operations and cash flows of Acme United Corporation (the “Company”). These adjustments are of a normal, recurring nature. However, the financial statements do not include all the disclosures normally required by accounting principles generally accepted in the United States of America or those normally made in the Company's Annual Report on Form 10-K. Please refer to the Company's Annual Report on Form 10-K for the year ended December 31, 2020 for such disclosures. The condensed consolidated balance sheet as of December 31, 2020 was derived from the audited consolidated balance sheet as of that date. The results of operations for interim periods are not necessarily indicative of the results to be expected for the full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the financial statements and notes thereto included in the Company’s 2020 Annual Report on Form 10-K.

The Company has evaluated events and transactions subsequent to March 31, 2021 and through the date these condensed consolidated financial statements were issued.

Recently Issued and Adopted Accounting Standards

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The update eliminates, clarifies and modifies certain guidance related to the accounting for income taxes. ASU 2019-12 is effective for annual reporting periods beginning after December 15, 2020, i.e. commencing with our current fiscal year. The adoption of ASU 2019-12 did not have a material effect on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendments in this update eliminate Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects from any tax-deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The Company adopted this standard on January 1, 2020. The adoption of this standard has not had an impact to the financial statements of the Company.