CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Class A Common Stock Common Stock.	Class B Common Stock Common Stock.	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2019	$ 68	$ 9	$ 66,811	$ 162,822	$ (37,358)	$ 192,352
Balance, shares at Dec. 31, 2019	6,771	954
Net income (loss)	$ 0	$ 0	0	(1,913)		(1,913)
Conversion of shares from Class B to Class A	$ 0	$ 0	0
Conversion of shares from Class B to Class A (in shares)	16	(16)
Forfeiture of restricted stock	$ 0	$ 0	0
Forfeiture of restricted stock (in shares)	(2)	0
Dividends declared per common share	$ 0	$ 0	0	(1,919)		(1,919)
Compensation expense related to restricted stock awards	0	0	2,221			2,221
Purchase of shares held in treasury	0	0	0		(449)	(449)
401(k) plan contribution	0	0	(132)		382	250
Balance at Dec. 31, 2020	$ 68	$ 9	68,900	158,990	(37,425)	190,542
Balance, shares at Dec. 31, 2020	6,785	938
Net income (loss)	$ 0	$ 0	0	11,157		11,157
Conversion of shares from Class B to Class A	$ 0	$ 0	0
Conversion of shares from Class B to Class A (in shares)	12	(12)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	$ 0	$ 0	0
Issuance of restricted stock	38	39
Dividends declared per common share	$ 0	$ 0	0	(5,901)		(5,901)
Compensation expense related to restricted stock awards	0	0	1,335			1,335
Purchase of shares held in treasury	0	0	0		(435)	(435)
401(k) plan contribution	0	0	(200)		421	221
Balance at Dec. 31, 2021	$ 68	$ 9	70,035	164,246	(37,439)	196,919
Balance, shares at Dec. 31, 2021	6,835	965
Net income (loss)	$ 0	$ 0	0	9,202		9,202
Conversion of shares from Class B to Class A	$ 9	$ (9)	0
Conversion of shares from Class B to Class A (in shares)	965	(965)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	$ 1	$ 0	(1)
Issuance of restricted stock	67	0
Dividends declared per common share	$ 0	$ 0	0	(29,552)		(29,552)
Compensation expense related to restricted stock awards	0	0	1,858			1,858
Purchase of shares held in treasury	0	0	0		(147)	(147)
401(k) plan contribution	0	0	(228)		477	249
Balance at Dec. 31, 2022	$ 78	$ 0	$ 71,664	$ 143,896	$ (37,109)	$ 178,529
Balance, shares at Dec. 31, 2022	7,867	0