Revenue recognition - Schedule of Disaggregation of Net Sales By Reporting Unit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation Of Revenue [Line Items]
Net sales	$ 158,285	$ 145,941	$ 161,287
Security Products
Disaggregation Of Revenue [Line Items]
Net sales	120,703	115,243	121,182
Marine Components
Disaggregation Of Revenue [Line Items]
Net sales	$ 37,582	$ 30,698	$ 40,105