Note P - Business Acquisitions - Schedule of Pro Forma Results of Operations (Details) - Knox Safety, Inc [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Net sales	$ 340,140	$ 371,058
Net earnings	$ 19,299	$ 24,088
Net earnings per share (basic and diluted) (in dollars per share)	$ 2.92	$ 3.63
Weighted average shares outstanding (basic and diluted) (in shares)	7,081	7,060