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Segment and Geographic Information (Details) - USD ($)
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Sales $ 272,751,967 $ 258,857,380
Other Assets noncurrent 235,308,747 252,039,201
Net Sales 272,751,967 258,857,380
Gross Margin 67,267,160 61,772,306
Product development expense (4,888,496) (5,592,355)
Selling and administrative expenses (42,229,660) (39,146,727)
Consolidated operating profit 20,149,004 17,033,224
Engineered Solutions Segment [Member]    
Net Sales 272,751,967 258,857,380
Material cost (142,280,064) (136,675,688)
Labor cost (13,809,443) (11,600,272)
Other variable and fixed overhead 49,395,300 48,809,114
Gross Margin 67,267,160 61,772,306
Product development expense (4,888,496) (5,592,355)
Selling and administrative expenses (42,229,660) (39,146,727)
Operating Profit 20,149,004 17,033,224
Consolidated operating profit 20,149,004 17,033,224
Adjustments and reconciling items 0 0
Reportable Geographical Components [Member] | Foreign [Member]    
Sales 4,414,612 3,603,610
Other Assets noncurrent 13,723,719 14,447,254
Reportable Geographical Components [Member] | United States [Member]    
Sales 268,337,355 255,253,770
Other Assets noncurrent $ 221,585,028 $ 237,591,947