Inventories, Net (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Inventories, Net

	December 31,		June 30,
	2020		2021
	(In thousands)
Raw materials:
Security Products	$	2,318	$	3,470
Marine Components		902		940
Total raw materials		3,220		4,410
Work-in-process:
Security Products		9,214		9,282
Marine Components		2,454		3,122
Total work-in-process		11,668		12,404
Finished goods:
Security Products		2,235		1,908
Marine Components		1,214		1,226
Total finished goods		3,449		3,134
Total inventories, net	$	18,337	$	19,948