Segment Reporting Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales to external customers	$ 82,239	$ 68,190	$ 237,673	$ 201,889
Depreciation and amortization	1,805	1,699	5,520	5,268
Operating income	8,993	7,597	24,362	18,785
Long-lived assets	50,182	41,431	50,182	41,431
Capital expenditures	5,751	1,218	10,306	2,953
Total assets	409,727	366,654	409,727	366,654	391,496
Americas Region
Segment Reporting Information [Line Items]
Net sales to external customers	35,112	29,817	97,623	84,306
Depreciation and amortization	988	959	3,003	3,035
Operating income	1,966	1,789	3,340	2,068
Long-lived assets	31,228	22,060	31,228	22,060
Capital expenditures	4,651	554	7,778	1,315
Total assets	214,101	193,157	214,101	193,157
Europe/Africa Region
Segment Reporting Information [Line Items]
Net sales to external customers	26,046	21,516	78,813	66,623
Depreciation and amortization	490	477	1,528	1,407
Operating income	864	1,184	5,029	2,973
Long-lived assets	16,482	16,852	16,482	16,852
Capital expenditures	834	398	1,947	930
Total assets	117,824	107,518	117,824	107,518
Asia Pacific Region
Segment Reporting Information [Line Items]
Net sales to external customers	21,081	16,857	61,237	50,960
Depreciation and amortization	327	263	989	826
Operating income	6,163	4,624	15,993	13,744
Long-lived assets	2,472	2,519	2,472	2,519
Capital expenditures	266	266	581	708
Total assets	$ 77,802	$ 65,979	$ 77,802	$ 65,979