CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common Stock Class A Common stock	Common Stock Class B Common stock	Capital in Excess of Par Value	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2022	$ 124,534	$ 107	$ 38	$ 65,008	$ (8,939)	$ 80,238	$ (11,918)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(4,777)					(4,777)
Issuance of common stock, net of conversions	0	4	(2)	(2)
Share-based compensation expense	797			797
Cash dividends	(1,460)					(1,460)
Other comprehensive income (loss), net of tax	(916)						(916)
Reclassification adjustment to net income (loss)	251						251
Ending balance at Mar. 31, 2023	118,429	111	36	65,803	(8,939)	74,001	(12,583)
Beginning balance at Dec. 31, 2023	147,267	112	36	70,401	(12,013)	99,398	(10,667)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,162)					(1,162)
Purchase of treasury stock	(554)				(554)
Issuance of common stock, net of conversions	0	2		(2)
Share-based compensation expense	1,904			1,904
Cash dividends	(1,531)					(1,531)
Other comprehensive income (loss), net of tax	(1,060)						(1,060)
Reclassification adjustment to net income (loss)	543						543
Ending balance at Mar. 31, 2024	$ 145,407	$ 114	$ 36	$ 72,303	$ (12,567)	$ 96,705	$ (11,184)