Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Schedule of Business Segment Information

	Three months ended						Nine months ended
	September 30,						September 30,
	2015			2016			2015			2016
	(In thousands)						(In thousands)
Net sales:
Security Products	$	23,115		$	24,680		$	72,831		$	71,289
Marine Components		3,390			3,724			10,483			11,297
Total net sales	$	26,505		$	28,404		$	83,314		$	82,586
Operating income (loss):
Security Products	$	4,455		$	5,421		$	14,656		$	14,676
Marine Components		422			547			1,288			1,436
Corporate operating expenses		(1,443	)		(1,495	)		(4,503	)		(4,569	)
Total operating income		3,434			4,473			11,441			11,543
Interest income		16			88			32			161
Income before taxes	$	3,450		$	4,561		$	11,473		$	11,704