CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Class A Common Stock Common Stock.	Class A Common Stock	Class B Common Stock Common Stock.	Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2021	$ 68		$ 9		$ 70,035	$ 164,246	$ (37,439)	$ 196,919
Balance, shares at Dec. 31, 2021	6,835	6,835	965	965
Net income (loss)	$ 0		$ 0		0	1,204	0	1,204
Dividends declared per common share	0		0		0	(968)	0	(968)
Compensation expense related to restricted stock awards	0		0		339	0	0	339
401(k) plan contribution	0		0		(229)	0	477	248
Balance at Mar. 31, 2022	$ 68		$ 9		70,145	164,482	(36,962)	197,742
Balance, shares at Mar. 31, 2022	6,835		965
Balance at Dec. 31, 2021	$ 68		$ 9		70,035	164,246	(37,439)	196,919
Balance, shares at Dec. 31, 2021	6,835	6,835	965	965
Net income (loss)								4,923
Balance at Sep. 30, 2022	$ 77		$ 0		71,532	153,373	(36,969)	188,013
Balance, shares at Sep. 30, 2022	7,800		0
Balance at Mar. 31, 2022	$ 68		$ 9		70,145	164,482	(36,962)	197,742
Balance, shares at Mar. 31, 2022	6,835		965
Net income (loss)	$ 0		$ 0		0	3,823	0	3,823
Dividends declared per common share	0		0		0	(1,210)	0	(1,210)
Compensation expense related to restricted stock awards	0		0		338	0	0	338
Balance at Jun. 30, 2022	$ 68		$ 9		70,483	167,095	(36,962)	200,693
Balance, shares at Jun. 30, 2022	6,835		965
Net income (loss)	$ 0		$ 0		0	(104)	0	(104)
Conversion of shares from Class B to Class A	$ 9		$ (9)		0	0	0	0
Conversion of shares from Class B to Class A (in shares)	965		(965)
Dividends declared per common share	$ 0		$ 0		0	(13,618)	0	(13,618)
Compensation expense related to restricted stock awards	0		0		1,049	0	0	1,049
Purchase of shares held in treasury	0		0		0	0	(7)	(7)
Balance at Sep. 30, 2022	$ 77		$ 0		71,532	153,373	(36,969)	188,013
Balance, shares at Sep. 30, 2022	7,800		0
Balance at Dec. 31, 2022	$ 78		$ 0		71,664	143,896	(37,109)	178,529	[1]
Balance, shares at Dec. 31, 2022	7,867	7,867	0	0
Net income (loss)	$ 0		$ 0		0	920	0	920
Dividends declared per common share	0		0		0	(1,531)	0	(1,531)
Compensation expense related to restricted stock awards	0		0		245	0	0	245
401(k) plan contribution	0		0		(185)	0	441	256
Balance at Mar. 31, 2023	$ 78		$ 0		71,724	143,285	(36,668)	178,419
Balance, shares at Mar. 31, 2023	7,867		0
Balance at Dec. 31, 2022	$ 78		$ 0		71,664	143,896	(37,109)	178,529	[1]
Balance, shares at Dec. 31, 2022	7,867	7,867	0	0
Net income (loss)								6,999
Balance at Sep. 30, 2023	$ 78		$ 0		72,222	146,303	(36,668)	181,935
Balance, shares at Sep. 30, 2023	7,867	7,867	0	0
Balance at Mar. 31, 2023	$ 78		$ 0		71,724	143,285	(36,668)	178,419
Balance, shares at Mar. 31, 2023	7,867		0
Net income (loss)	$ 0		$ 0		0	3,350	0	3,350
Dividends declared per common share	0		0		0	(1,531)	0	(1,531)
Compensation expense related to restricted stock awards	0		0		248	0	0	248
Balance at Jun. 30, 2023	$ 78		$ 0		71,972	145,104	(36,668)	180,486
Balance, shares at Jun. 30, 2023	7,867		0
Net income (loss)	$ 0		$ 0		0	2,729	0	2,729
Dividends declared per common share	0		0		0	(1,530)	0	(1,530)
Compensation expense related to restricted stock awards	0		0		250	0	0	250
Balance at Sep. 30, 2023	$ 78		$ 0		$ 72,222	$ 146,303	$ (36,668)	$ 181,935
Balance, shares at Sep. 30, 2023	7,867	7,867	0	0

[1] The balance sheet at December 31, 2022 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.