Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Schedule of Business Segment Information

	Three months ended						Nine months ended
	September 30,						September 30,
	2020			2021			2020			2021
	(In thousands)
Net sales:
Security Products	$	21,209		$	25,829		$	65,251		$	79,301
Marine Components		7,217			8,727			19,286			27,432
Total net sales	$	28,426		$	34,556		$	84,537		$	106,733
Operating income (loss):
Security Products	$	2,797		$	5,529		$	11,871		$	16,864
Marine Components		1,129			1,255			3,010			4,796
Corporate operating expenses		(1,844	)		(1,653	)		(5,410	)		(4,954	)
Total operating income		2,082			5,131			9,471			16,706
Interest income		360			289			1,337			945
Income before income taxes	$	2,442		$	5,420		$	10,808		$	17,651