Business Segment Information (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Schedule of Business Segment Information

	Three months ended						Six months ended
	June 30,						June 30,
	2020			2021			2020			2021
	(In thousands)
Net sales:
Security Products	$	18,573		$	27,587		$	44,042		$	53,472
Marine Components		5,227			8,666			12,069			18,705
Total net sales	$	23,800		$	36,253		$	56,111		$	72,177
Operating income (loss):
Security Products	$	3,361		$	5,845		$	9,074		$	11,335
Marine Components		799			1,598			1,881			3,541
Corporate operating expenses		(1,791	)		(1,685	)		(3,566	)		(3,301	)
Total operating income		2,369			5,758			7,389			11,575
Interest income		370			318			977			656
Income before income taxes	$	2,739		$	6,076		$	8,366		$	12,231