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, 2020	$ 68		$ 9		$ 68,900	$ 158,990	$ (37,425)	$ 190,542
Balance, shares at Dec. 31, 2020	6,785	6,785	938	938
Net income	$ 0		$ 0		0	758	0	758
Compensation expense related to restricted stock awards	0		0		343	0	0	343
401(k) plan contribution	0		0		(200)	0	421	221
Balance at Mar. 31, 2021	$ 68		$ 9		69,043	159,748	(37,004)	191,864
Balance, shares at Mar. 31, 2021	6,785		938
Balance at Dec. 31, 2020	$ 68		$ 9		68,900	158,990	(37,425)	190,542
Balance, shares at Dec. 31, 2020	6,785	6,785	938	938
Issuance of restricted stock (in shares)		38		39
Balance at Dec. 31, 2021	$ 68		$ 9		70,035	164,246	(37,439)	196,919	[1]
Balance, shares at Dec. 31, 2021	6,835	6,835	965	965
Net income	$ 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	6,835	965	965

[1] The balance sheet at December 31, 2021 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.