Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net sales	$ 388,228,000	$ 340,912,000	$ 321,623,000
Cost of sales	309,662,000	273,460,000	266,498,000
Gross profit	78,566,000	67,452,000	55,125,000
Selling, General and Administrative Expense	31,838,000	30,784,000	27,121,000
Intangibles amortization	1,515,000	1,635,000	582,000
Goodwill and Intangible Asset Impairment	0	0	5,295,000
Operating profit	45,213,000	35,033,000	22,127,000
Other Nonoperating Income (Expense)	5,457,000	7,398,000	3,817,000
Earnings before provision for income taxes	50,670,000	42,431,000	25,944,000
Provision for income taxes	9,210,000	7,872,000	5,245,000
Net earnings	$ 41,460,000	$ 34,559,000	$ 20,699,000
Weighted average common shares outstanding:
Basic and diluted (in shares)	7,128	7,106	7,081
Earnings per share, basic and diluted:
Net earnings per share (in dollars per share)	$ 5.82	$ 4.86	$ 2.92
Comprehensive income:
Net earnings	$ 41,460,000	$ 34,559,000	$ 20,699,000
Other comprehensive income, net of tax:
Unrealized gain on available-for-sale securities, net of tax	13,000	125,000	(123,000)
Comprehensive income	$ 41,473,000	$ 34,684,000	$ 20,576,000