Consolidated Statement of Stockholders' Equity - USD ($)	Common Stock [Member] Class A Common Stock [Member]	Common Stock [Member] Class A Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member] Class B Common Stock [Member]	Common Stock [Member] Class B Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Treasury Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance at Dec. 31, 2022	$ 301,203		$ 56,492		$ 325,601,647		$ (41,703,747)		$ 240,563,774		$ (41,226,357)		$ 483,593,012
Beginning balance (ASU 2016-13 [Member]) at Dec. 31, 2022		$ 0		$ 0		$ 0		$ 0		$ (1,895,902)		$ 0		$ (1,895,902)
Beginning balance (in shares) at Dec. 31, 2022	30,120,263		5,649,240
Beginning balance (in shares) (ASU 2016-13 [Member]) at Dec. 31, 2022		0		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 350		$ 0		440,746		0		0		0		441,096
Issuance of common stock (stock compensation plans) (in shares)	35,045		0
Share-based compensation	$ 1,431		$ 0		2,218,355		0		0		0		2,219,786
Share-based compensation (in shares)	143,004		0
Net income	$ 0		$ 0		0		0		5,203,596		0		5,203,596
Cash dividends declared	0		0		0		0		(7,057)		0		(7,057)
Grant of stock options	0		0		114,724		0		(114,724)		0		0
Other comprehensive income (loss)	0		0		0		4,007,638		0		0		4,007,638
Ending balance at Mar. 31, 2023	$ 302,984		$ 56,492		328,375,472		(37,696,109)		243,749,687		(41,226,357)		493,562,169
Ending balance (in shares) at Mar. 31, 2023	30,298,312		5,649,240
Beginning balance at Dec. 31, 2023	$ 307,646		$ 56,492		335,694,478		(32,881,822)		217,794,917		(41,226,357)		479,745,354
Beginning balance (in shares) at Dec. 31, 2023	30,764,555		5,649,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (stock compensation plans)	$ 383		$ 0		472,740		0		0		0		473,123
Issuance of common stock (stock compensation plans) (in shares)	38,287		0
Share-based compensation	$ 164		$ 0		522,460		0		0		0		522,624
Share-based compensation (in shares)	16,400		0
Net income	$ 0		$ 0		0		0		5,955,551		0		5,955,551
Cash dividends declared	0		0		0		0		(8,888)		0		(8,888)
Grant of stock options	0		0		128,267		0		(128,267)		0		0
Other comprehensive income (loss)	0		0		0		(1,601,290)		0		0		(1,601,290)
Ending balance at Mar. 31, 2024	$ 308,193		$ 56,492		$ 336,817,945		$ (34,483,112)		$ 223,613,313		$ (41,226,357)		$ 485,086,474
Ending balance (in shares) at Mar. 31, 2024	30,819,242		5,649,240