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Retirement Benefit Plans (Details 6) - Pension Benefit [Member] - USD ($)	Dec. 28, 2024	Dec. 30, 2023
Fair value of plan assets	$ 59,311,220	$ 60,836,643
Level 1 [Member]
Fair value of plan assets	5,759,658	4,774,396
Level 2 [Member]
Fair value of plan assets	53,551,562	56,062,246
Level 3 [Member]
Fair value of plan assets	0	0
Russell 14 Year LDI Fixed Income Fund [Member]
Fair value of plan assets	16,009,003	17,481,926
Russell 14 Year LDI Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets	0	0
Russell 14 Year LDI Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets	16,009,003	17,481,926
Russell 14 Year LDI Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets	0	0
Common/Collective Trust Funds [Member]
Fair value of plan assets	413,731	411,688
Common/Collective Trust Funds [Member] | Level 1 [Member]
Fair value of plan assets	0	0
Common/Collective Trust Funds [Member] | Level 2 [Member]
Fair value of plan assets	413,731	411,688
Common/Collective Trust Funds [Member] | Level 3 [Member]
Fair value of plan assets	0	0
EasternCompanyCommonStock [Member]
Fair value of plan assets	5,759,658	4,774,396
EasternCompanyCommonStock [Member] | Level 1 [Member]
Fair value of plan assets	5,759,658	4,774,396
EasternCompanyCommonStock [Member] | Level 3 [Member]
Fair value of plan assets	0	0
Russell Global Private Credit Fund (j) [Member]
Fair value of plan assets	1,227,378
Russell Global Private Credit Fund (j) [Member] | Level 2 [Member]
Fair value of plan assets	1,227,378
RITC Mult-Manager Bond Fund (k) [Member]
Fair value of plan assets	961,911
RITC Mult-Manager Bond Fund (k) [Member] | Level 2 [Member]
Fair value of plan assets	961,911
Russell 25 Year LDI Fixed Income Fund [Member]
Fair value of plan assets	7,714,633	9,858,521
Russell 25 Year LDI Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets	0	0
Russell 25 Year LDI Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets	7,714,633	9,858,521
Russell 25 Year LDI Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets	0	0
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member]
Fair value of plan assets	2,764,897	876,584
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets	0	0
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets	2,764,897	876,584
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets	0	0
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member]
Fair value of plan assets	793,047	835,778
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets	0	0
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets	793,047	835,778
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets	0	0
RITC Russell Investments Russell 1000? Index Fund (a) [Member]
Fair value of plan assets	6,791,908	6,595,564
RITC Russell Investments Russell 1000? Index Fund (a) [Member] | Level 2 [Member]
Fair value of plan assets	6,791,908	6,595,564
RITC Small Cap Fund (b) [Member]
Fair value of plan assets	515,724	567,998
RITC Small Cap Fund (b) [Member] | Level 2 [Member]
Fair value of plan assets	515,724	567,998
RITC International Fund (c) [Member]
Fair value of plan assets	3,403,688	3,669,895
RITC International Fund (c) [Member] | Level 2 [Member]
Fair value of plan assets	3,403,688	3,669,895
RITC Emerging Markets Fund (d) [Member]
Fair value of plan assets	1,233,972	1,298,014
RITC Emerging Markets Fund (d) [Member] | Level 2 [Member]
Fair value of plan assets	1,233,972	1,298,014
RITC World Equity Fund (e) [Member]
Fair value of plan assets	7,470,472	7,960,264
RITC World Equity Fund (e) [Member] | Level 2 [Member]
Fair value of plan assets	7,470,472	7,960,264
RITC Global Real Estate Securities Fund (f) [Member]
Fair value of plan assets	1,208,511	1,373,408
RITC Global Real Estate Securities Fund (f) [Member] | Level 2 [Member]
Fair value of plan assets	1,208,511	1,373,408
RITC Global Listed Infrastructure Fund (g) [Member]
Fair value of plan assets	1,229,983	1,327,625
RITC Global Listed Infrastructure Fund (g) [Member] | Level 2 [Member]
Fair value of plan assets	1,229,983	1,327,625
RITC Commodities Fund (h) [Member]
Fair value of plan assets	171,003	1,161,864
RITC Commodities Fund (h) [Member] | Level 2 [Member]
Fair value of plan assets	171,003	1,161,864
RIIFL High Yield Bond Fund (i) [Member]
Fair value of plan assets	1,641,701	2,643,118
RIIFL High Yield Bond Fund (i) [Member] | Level 2 [Member]
Fair value of plan assets	$ 1,641,701	$ 2,643,118

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