CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($)	3 Months Ended
Apr. 03, 2021	Mar. 28, 2020
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
Net income	$ 5,840,827	$ 2,895,817
Other comprehensive income/(loss):
Change in foreign currency translation	(79,054)	(1,304,447)
Change in marketable securities, net of taxes of:2021 - $67 and 2020 - $2,897	205	8,878
Change in fair value of interest rate swap, net of tax cost (benefit) of:2021 - $130,434 and 2020 - $(535,029)	413,040	(1,697,793)
Change in pension and postretirement benefit costs, net of taxes of:2021 - $92,194 and 2020 - $81,143	295,744	260,295
Total other comprehensive income (loss)	629,935	(2,733,067)
Comprehensive income	$ 6,470,762	$ 162,750

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