Segment Reporting Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 28, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales to external customers	$ 75,748	$ 69,939
Depreciation and amortization	3,086	2,493
Operating income (loss)	4,330	1,856
Long-lived assets	79,033	72,795
Capital expenditures	2,057	2,436
Total assets	418,254	414,461	$ 409,186
Americas Region
Segment Reporting Information [Line Items]
Net sales to external customers	34,499	30,398
Depreciation and amortization	1,750	1,522
Operating income (loss)	956	(2,174)
Long-lived assets	48,923	48,095
Capital expenditures	580	1,635
Total assets	194,933	217,587
Europe/Africa Region
Segment Reporting Information [Line Items]
Net sales to external customers	22,427	22,209
Depreciation and amortization	956	611
Operating income (loss)	(1,352)	33
Long-lived assets	27,126	21,791
Capital expenditures	1,259	596
Total assets	137,467	118,559
Asia-Pacific Region
Segment Reporting Information [Line Items]
Net sales to external customers	18,822	17,332
Depreciation and amortization	380	360
Operating income (loss)	4,726	3,997
Long-lived assets	2,984	2,909
Capital expenditures	218	205
Total assets	$ 85,854	$ 78,315