Note K - Business Acquisition - Pro Forma Information (Details) - OneEvent Technologies, Inc. [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 29, 2019	Sep. 29, 2019
Net sales	$ 78,011	$ 213,652
Net earnings	$ 16,196	$ 29,069
Net earnings per share (basic and diluted) (in dollars per share)	$ 2.31	$ 4.14
Weighted average shares outstanding (basic and diluted) (in shares)	7,020	7,018