Revenue recognition (Tables)

6 Months Ended

Jun. 30, 2023

Revenue recognition

Schedule of Disaggregates Net Sales By Reporting Unit

	Three months ended				Six months ended
	June 30,				June 30,
	2022		2023		2022		2023
	(In thousands)
Net sales:
Security Products	$	28,837	$	25,672	$	58,418	$	53,014
Marine Components		12,838		10,944		25,307		24,753
Total	$	41,675	$	36,616	$	83,725	$	77,767