| Cover | Jun. 13, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | The Eastern Company |
| Entity Central Index Key | 0000031107 |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 to Form 8-K (this “Amendment”) is an amendment to the Current Report on Form 8-K filed by The Eastern Company (the “Company”) on June 29, 2022 (the “Original Form 8-K”) concerning the appointment of Mr. Mark Hernandez and Mr. Michael Mardy as members of the Company’s Board of Directors (the “Board”). This Amendment is being filed in accordance with Instruction No. 2 to Item 5.02 of Form 8-K solely for the purpose of disclosing the appointments of Mr. Hernandez and Mr. Mardy to certain Committees of the Board. The complete text of Item 5.02, as amended, is set forth below. This Amendment does not amend, update or change any other disclosure contained in the Original Form 8-K |
| Entity Emerging Growth Company | false |
| Document Period End Date | Jun. 13, 2022 |
| Entity Incorporation State Country Code | CT |
| Entity File Number | 001-35383 |
| Entity Tax Identification Number | 06-0330020 |
| Entity Address Postal Zip Code | 06770 |
| City Area Code | 203 |
| Local Phone Number | 729-2255 |
| Entity Address Address Line 1 | 112 Bridge Street |
| Entity Address State Or Province | CT |
| Entity Address City Or Town | Naugatuck |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, No Par Value |
| Trading Symbol | EML |
| Security Exchange Name | NASDAQ |
