Consolidated Statements of Shareholders' Equity - USD ($)	Total	Common Stock	Retained Earnings	Accumulated other comprehensive Income (Loss)	Treasury Stock
Balance, shares at Dec. 31, 2021		9,029,852			2,764,325
Balance, amount at Dec. 31, 2021	$ 114,602,264	$ 32,620,008	$ 129,422,625	$ (26,532,756)	$ (20,907,613)
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	138,985,852	(23,412,638)	$ (22,544,684)
Net income	8,585,002
Balance, amount at Dec. 30, 2023	132,480,584
Balance, shares at Dec. 31, 2022		9,056,421			2,834,445
Balance, amount at Dec. 31, 2022	126,614,695	$ 33,586,165	138,985,852	(23,412,638)	$ (22,544,684)
Net income	8,585,002		8,585,002
Currency translation adjustment	274,379			274,379
Change in fair value of interest rate swap	(1,449,754)			(1,449,754)
Change in pension and other postretirement benefit costs, net of tax	1,593,037			1,593,037
Stock Options Exercised, amount	0
Treasury Stock Purchase, shares					(40,000)
Treasury Stock Purchase, amount	(735,783)				$ (735,783)
Issuance of Common Stock for directors' fees, shares		28,219
Issuance of Common Stock for directors' fees, amount	528,147	$ 528,147
Cash dividends declared,$0.44 per share	(2,765,686)		(2,765,686)
Issuance of stock awards, net, shares		7,175
Issuance of stock awards, net, amount	(163,453)	$ (163,453)
Balance, shares at Dec. 31, 2023		9,091,815			2,874,445
Balance, amount at Dec. 31, 2023	$ 132,480,584	$ 33,950,859	$ 144,805,168	$ (22,994,976)	$ (23,280,467)