Note L - Business Combination - Schedule of Pro Forma Results of Operations (Details) - Knox Safety, Inc [Member] $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2022 USD ($) $ / shares shares
Net sales	$ 65,069
Net earnings	$ 2,113
Net earnings per share (basic and diluted) (in dollars per share) | $ / shares	$ 0.41
Weighted average shares outstanding (basic and diluted) (in shares) | shares	7,073