CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Net sales	$ 37,971	$ 41,151
Cost of sales	28,304	28,447
Gross margin	9,667	12,704
Selling, general and administrative expense	5,952	5,664
Operating income	3,715	7,040
Interest income	1,224	947
Income before income taxes	4,939	7,987
Provision for income taxes	1,185	1,919
Net income	3,754	6,068
Other comprehensive loss, marketable securities adjustment:
Unrealized loss arising during year, net	(5)	(30)
Comprehensive income	$ 3,749	$ 6,038
Net income per basic share	$ 0.31	$ 0.49
Net income per diluted share	$ 0.31	$ 0.49
Weighted average shares outstanding - basic	12,314	12,307
Weighted average shares outstanding - diluted	12,314	12,307