Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock Including Additional Paid in Capital [Member] Common Class A [Member]	Common Stock Including Additional Paid in Capital [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member] Common Class A [Member]	Treasury Stock [Member] Common Class B [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Common Stock Outstanding [Member] Common Class A [Member]	Common Stock Outstanding [Member] Common Class B [Member]	Total
Balance at Dec. 31, 2019	$ 3,599,806	$ 1,465,522	$ 1,741,901			$ (1,905,780)	$ 16,527,083					$ 21,428,532
Share-based compensation expense	70,849											70,849
Stock awards	226,050											226,050
Repurchase of shares	0	0	0			(32,272)	0					(32,272)
Net income							5,839,387					5,839,387
Stock awards	226,050											226,050
Net Income							5,839,387					5,839,387
Balance at Dec. 31, 2020	3,896,705	1,465,522	1,741,901			(1,938,052)	22,366,470					$ 27,532,546
Balance (in shares) at Dec. 31, 2019				37,208	182,435			2,576,837	954,283	2,539,629	771,848
Class A shares issued to Directors and employees related to stock compensation plans (in shares)				0	0			17,250	0	17,250	0
Stock option exercise (in shares)				0	0			1,000	0	1,000	0	1,000
Share repurchase (in shares)				2,259	0			0	0	2,259	0
Share repurchase (in shares)				(2,259)	0			0	0	(2,259)	0
Balance (in shares) at Dec. 31, 2020				39,467	182,435			2,595,087	954,283	2,555,620	771,848
Share-based compensation expense	46,725	0	0			0	0					$ 46,725
Stock awards	382,619	0	0			0	0					382,619
Repurchase of shares	0	0	0			(43,061)	0					(43,061)
Net income	0	0	0			0	5,653,298					5,653,298
Stock awards	382,619	0	0			0	0					382,619
Stock option exercise	8,774	0				0	0					8,774
Acquisition	1,059,000	0				0	0					1,059,000
Net Income	0	0	0			0	5,653,298					5,653,298
Balance at Dec. 31, 2021	$ 5,393,823	$ 1,465,522	$ 1,741,901			$ (1,981,113)	$ 28,019,768					$ 34,639,901
Class A shares issued to Directors and employees related to stock compensation plans (in shares)				0	0			23,700	0	23,700	0
Stock option exercise (in shares)				0	0			2,000	0	2,000	0	2,000
Share repurchase (in shares)				2,377	0			0	0	2,377	0
Share repurchase (in shares)				(2,377)	0			0	0	(2,377)	0
Acquisition (in shares)				0	0			60,000	0	60,000	0
Stock conversion (in shares)				0	0			40,000	40,000	40,000	40,000
Stock conversion (in shares)				0	0			(40,000)	(40,000)	(40,000)	(40,000)
Balance (in shares) at Dec. 31, 2021				41,844	182,435			2,720,787	914,283	2,678,943	731,848