RETIREMENT BENEFIT PLANS (Details 6) - Pension Benefit [Member] - USD ($)	Jan. 01, 2022	Jan. 02, 2021
Fair value of plan assets at beginning of year	$ 80,814,956	$ 78,361,102
Level 1 [Member]
Fair value of plan assets at beginning of year	5,460,173	5,230,134
Level 2 [Member]
Fair value of plan assets at beginning of year	75,354,783	73,130,968
Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
Common/Collective Trust Funds [Member]
Fair value of plan assets at beginning of year	356,173	347,538
Common/Collective Trust Funds [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	0	0
Common/Collective Trust Funds [Member] | Level 2 [Member]
Fair value of plan assets at beginning of year	356,173	347,538
Common/Collective Trust Funds [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
EasternCompanyCommonStock [Member]
Fair value of plan assets at beginning of year	5,460,173	5,230,134
EasternCompanyCommonStock [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	5,460,173	5,230,134
EasternCompanyCommonStock [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
Multi Asset Core Plus Fund [Member]
Fair value of plan assets at beginning of year	36,142,837	35,139,260
Multi Asset Core Plus Fund [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	0	0
Multi Asset Core Plus Fund [Member] | Level 2 [Member]
Fair value of plan assets at beginning of year	36,142,837	35,139,260
Multi Asset Core Plus Fund [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 25 Year LDI Fixed Income Fund [Member]
Fair value of plan assets at beginning of year	4,320,207	2,506,615
Russell 25 Year LDI Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 25 Year LDI Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets at beginning of year	4,320,207	2,506,615
Russell 25 Year LDI Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 14 Year LDI Fixed Income Fund [Member]
Fair value of plan assets at beginning of year	26,430,482	26,452,904
Russell 14 Year LDI Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 14 Year LDI Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets at beginning of year	26,430,482	26,452,904
Russell 14 Year LDI Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member]
Fair value of plan assets at beginning of year	3,264,328	3,500,718
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets at beginning of year	3,264,328	3,500,718
Russell 15 to 20 Year STRIPS Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member]
Fair value of plan assets at beginning of year	4,840,756	5,183,933
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member] | Level 1 [Member]
Fair value of plan assets at beginning of year	0	0
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member] | Level 2 [Member]
Fair value of plan assets at beginning of year	4,840,756	5,183,933
Russell 10 to 15 Year STRIPS Fixed Income Fund [Member] | Level 3 [Member]
Fair value of plan assets at beginning of year	$ 0	$ 0