Business segment information (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Business Segment Information

	Years ended December 31,
	2021		2022		2023
	(In thousands)
Net sales:
Security Products	$	105,124	$	114,519	$	121,182
Marine Components		35,691		52,043		40,105
Total net sales	$	140,815	$	166,562	$	161,287
Operating income:
Security Products	$	21,622	$	22,744	$	24,941
Marine Components		5,591		9,561		7,218
Corporate operating expenses		(6,687)		(6,869)		(6,724)
Total operating income		20,526		25,436		25,435
Interest income		1,197		1,877		4,168
Income before income taxes	$	21,723	$	27,313	$	29,603
Depreciation and amortization:
Security Products	$	2,890	$	2,801	$	2,748
Marine Components		940		1,167		1,217
Corporate		9		9		8
Total	$	3,839	$	3,977	$	3,973

Capital expenditures:
Security Products	$	1,044	$	2,015	$	970
Marine Components		3,050		1,680		160
Total	$	4,094	$	3,695	$	1,130

Net sales point of destination:
United States	$	129,160	$	153,982	$	155,092
Canada		8,061		9,227		3,153
Mexico		589		722		829
Other		3,005		2,631		2,213
Total	$	140,815	$	166,562	$	161,287

	December 31,
	2021		2022		2023
	(In thousands)
Total assets:
Security Products	$	78,193	$	80,671	$	78,519
Marine Components		18,167		26,372		24,619
Corporate		96,092		70,344		84,466
Total	$	192,452	$	177,387	$	187,604