Business and Geographic Segments - Schedule of Business Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net sales:
Total net sales	$ 22,300	$ 24,200	$ 24,000	$ 21,500	$ 19,300	$ 21,300	$ 22,200	$ 20,400	$ 92,045	$ 83,196	$ 79,815
Operating income (loss):
Total operating income	2,000	3,000	2,900	1,400		1,600	2,200	1,600	9,328	5,418	6,412
Other non-operating income, net									40		358
Interest expense									(127)	(479)	(722)
Income from continuing operations before income taxes									9,241	4,939	6,048
Depreciation and amortization									3,270	5,772	6,778
Total capital expenditure									3,501	4,477	3,195
Security Products
Net sales:
Total net sales									81,510	73,715	71,397
Operating income (loss):
Total operating income									16,142	14,143	14,361
Depreciation and amortization									2,460	2,618	2,976
Total capital expenditure									3,171	2,029	1,714
Marine Components
Net sales:
Total net sales									10,535	9,481	8,418
Operating income (loss):
Total operating income									(148)	(819)	(1,223)
Depreciation and amortization									741	687	907
Total capital expenditure									310	713	112
Corporate
Operating income (loss):
Total operating income									(6,666)	(7,906)	(6,726)
Depreciation and amortization									69	63	42
Total capital expenditure									20	14	36
Furniture Components
Operating income (loss):
Depreciation and amortization										2,404	2,853
Total capital expenditure										$ 1,721	$ 1,333