Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member] Common Class A [Member]	Treasury Stock, Common [Member] Common Class B [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Common Stock Outstanding [Member] Common Class A [Member]	Common Stock Outstanding [Member] Common Class B [Member]	Common Class A [Member]	Common Class B [Member]	Total
Balance at Dec. 31, 2022	$ 7,351,563	$ 1,465,522	$ 1,741,901			$ (2,125,252)	$ 34,581,171					$ 43,014,905
Share-based compensation expense	1,377,423	0	0			0	0					1,377,423
Stock issuance (see note 6)	150,000	0	0			0	0					150,000
Share repurchase	0	0	0			(111,774)	0					(111,774)
Net income	0	0	0			0	13,294,793					13,294,793
Balance at Dec. 31, 2023	$ 8,878,986	$ 1,465,522	1,741,901			(2,237,026)	47,875,964					57,725,347
Balance (in shares) at Dec. 31, 2022	2,791,449	914,283		47,412	182,435			2,744,037	731,848
Class A shares issued to Directors and employees related to stock compensation plans (in shares)	34,700	0		0	0			34,700	0
Stock issuance (see note 6) (in shares)	7,317	0		0	0			7,317	0
Stock forfeit (in shares)	(500)	0		0	0			(500)	0
Share repurchase (in shares)	0	0		6,662	0					6,662	0
Share repurchase (in shares)								(6,662)	0
Balance (in shares) at Dec. 31, 2023	2,832,966	914,283		54,074	182,435			2,778,892	731,848
Share-based compensation expense	$ 1,309,029	$ 0	0			0	0					1,309,029
Stock issuance (see note 6)	30,011	0	0			0	0					30,011
Share repurchase	0	0	0			(312,601)	0					(312,601)
Net income	0	0	0			0	13,597,967					13,597,967
Balance at Dec. 31, 2024	$ 10,218,026	$ 1,465,522	$ 1,741,901			$ (2,549,627)	$ 61,473,932					$ 72,349,754
Class A shares issued to Directors and employees related to stock compensation plans (in shares)	36,400	0		0	0			36,400	0
Stock issuance (see note 6) (in shares)	741	0		0	0			741	0
Share repurchase (in shares)	0	0		8,485	0					8,485	0
Share repurchase (in shares)								(8,485)	0
Balance (in shares) at Dec. 31, 2024	2,870,107	914,283		62,559	182,435			2,807,548	731,848