Revenue Recognition - Schedule of Disaggregates Net Sales By Reporting Unit (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total net sales	$ 35,924	$ 32,311
Security Products
Disaggregation Of Revenue [Line Items]
Total net sales	25,885	25,469
Marine Components
Disaggregation Of Revenue [Line Items]
Total net sales	$ 10,039	$ 6,842