Business and Geographic Segments - Schedule of Business Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net sales:
Total net sales	$ 41,151	$ 42,050
Operating income (loss):
Total operating income	7,040	6,306
Interest income	947	214
Income before income taxes	7,987	6,520
Depreciation and amortization	1,010	961
Total capital expenditures	270	1,717
Security Products
Net sales:
Total net sales	27,342	29,581
Operating income (loss):
Total operating income	5,379	6,010
Marine Components
Net sales:
Total net sales	13,809	12,469
Operating income (loss):
Total operating income	3,317	2,009
Corporate
Operating income (loss):
Total operating income	$ (1,656)	$ (1,713)