Consolidated Statements of Shareholders' Equity - USD ($)	Total	Common Stock	Treasury Stock	Retained Earnings	Accumulated other comprehensive Income (Loss)
Balance, shares at Jan. 02, 2021		8,996,625	2,749,729
Balance, amount at Jan. 02, 2021	$ 104,306,458	$ 31,501,041	$ (20,537,963)	$ 122,840,131	$ (29,496,751)
Net income	9,349,171			9,349,171
Cash dividends declared, $0.44 per share	(2,766,677)			(2,766,677)
Currency translation adjustment	(135,418)				(135,418)
Change in fair value of interest rate swap	1,035,604				1,035,604
Change in pension and other postretirement benefit costs, net of tax	2,063,809				2,063,809
Stock Options Exercised, shares		14,681
Stock Options Exercised, amount	196,950	$ 196,950
Treasury Stock Purchase, shares			(14,596)
Treasury Stock Purchase, amount	(369,650)		$ (369,650)
Issuance of SARS	418,000	$ 418,000
Issuance of Common Stock for directors' fees, shares		18,546
Issuance of Common Stock for directors' fees, amount	504,017	$ 504,017
Balance, shares at Jan. 01, 2022		9,029,852	2,764,325
Balance, amount at Jan. 01, 2022	114,602,264	$ 32,620,008	$ (20,907,613)	129,422,625	(26,532,756)
Net income	12,301,918			12,301,918
Cash dividends declared, $0.44 per share	(2,738,691)			(2,738,691)
Currency translation adjustment	(1,959,424)				(1,959,424)
Change in fair value of interest rate swap	1,805,742				1,805,742
Change in pension and other postretirement benefit costs, net of tax	3,273,800				3,273,800
Stock Options Exercised, shares		1,370
Stock Options Exercised, amount	(58,515)	$ (58,515)
Treasury Stock Purchase, shares			(70,120)
Treasury Stock Purchase, amount	(1,637,071)		$ (1,637,071)
Issuance of SARS	504,694	$ 504,694
Issuance of Common Stock for directors' fees, shares		25,199
Issuance of Common Stock for directors' fees, amount	519,978	$ 519,978
Balance, shares at Dec. 31, 2022		9,056,421	2,834,445
Balance, amount at Dec. 31, 2022	$ 126,614,695	$ 33,586,165	$ (22,544,684)	$ 138,985,852	$ (23,412,638)