Segment Reporting Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net sales to external customers	$ 60,734	$ 64,807	$ 192,725	$ 177,084
Depreciation and amortization	1,796	1,711	5,164	5,047
Operating income	5,023	9,967	20,327	20,005
Long-lived assets	41,081	42,051	41,081	42,051
Capital expenditures	947	1,330	3,648	4,476
Total assets	329,215	294,625	329,215	294,625	312,791
Americas Region
Segment Reporting Information [Line Items]
Net sales to external customers	24,849	24,992	75,622	66,230
Depreciation and amortization	1,083	991	3,189	2,970
Operating income	418	3,086	467	3,690
Long-lived assets	21,855	22,875	21,855	22,875
Capital expenditures	175	807	1,069	2,541
Total assets	170,414	152,175	170,414	152,175
Europe/Africa Region
Segment Reporting Information [Line Items]
Net sales to external customers	21,024	25,416	67,270	68,370
Depreciation and amortization	409	502	1,206	1,386
Operating income	1,492	2,468	5,409	3,375
Long-lived assets	16,514	17,250	16,514	17,250
Capital expenditures	526	429	1,288	1,438
Total assets	97,637	90,381	97,637	90,381
Asia Pacific Region
Segment Reporting Information [Line Items]
Net sales to external customers	14,861	14,399	49,833	42,484
Depreciation and amortization	304	218	769	691
Operating income	3,113	4,413	14,451	12,940
Long-lived assets	2,712	1,926	2,712	1,926
Capital expenditures	246	94	1,291	497
Total assets	$ 61,164	$ 52,069	$ 61,164	$ 52,069