XML 34 R24.htm IDEA: XBRL DOCUMENT v3.21.1
Business Segment Information - Schedule of Business Segment Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Net sales:    
Total net sales $ 35,924 $ 32,311
Operating income (loss):    
Total operating income 5,817 5,020
Interest income 338 607
Income before income taxes 6,155 5,627
Operating Segments | Security Products    
Net sales:    
Total net sales 25,885 25,469
Operating income (loss):    
Total operating income 5,490 5,713
Operating Segments | Marine Components    
Net sales:    
Total net sales 10,039 6,842
Operating income (loss):    
Total operating income 1,943 1,082
Corporate    
Operating income (loss):    
Total operating income $ (1,616) $ (1,775)