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Retirement Benefit Plans (Details Narrative) - USD ($)
12 Months Ended
Dec. 31, 2022
Jan. 01, 2022
Dec. 31, 2021
Accrued amount for non discretionary safe harbor contribution $ 379,090 $ 323,082  
Description of investment plan The 401(k) Plan Amendment increased this match to 50% of the first 6% of contributions for the remainder of Fiscal 2016 and going forward. The 401(k) Plan Amendment also provided for an additional non-discretionary contribution (the “transitional credit”) for certain non-union U.S. employees who were eligible to participate in the Salaried Plan. The amount of this non-discretionary contribution ranges from 0% to 4% of wages, based on the age of the individual on June 1, 2016. The 401(k) Plan Amendment increased the non-discretionary safe harbor contribution to 3% and changed the eligibility to all non-union U.S. employees    
Pension Benefit [Member]      
Fair value of plan assets $ 58,527,250 $ 80,814,956  
Discount rate 2.08% 26.10% 1.49%
Accumulated benefit obligation $ 80,701,715 $ 107,420,338  
2023 5,000,000.0    
2024 5,100,000    
2025 5,300,000    
2026 5,500,000    
2027 5,600,000    
2028 through 2032 29,000,000.0    
Cash contributions 800,000    
Dividend received 95,488 95,488  
Pension Benefit [Member] | Eastern Company Common Stock [Member]      
Fair value of plan assets $ 4,184,107 5,460,173  
Other Postretirement Benefit [Member]      
Discount rate 5.28%   2.66%
2023 $ 46,000    
2024 46,000    
2025 49,000    
2026 52,000    
2027 53,000    
2028 through 2032 $ 302,000    
Cash contributions   $ 50,000  
Minimum [Member] | Pension Benefit [Member]      
Discount rate 2.75% 5.21% 2.40%
Maximum [Member] | Pension Benefit [Member]      
Discount rate 2.81% 5.23% 2.48%