Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011
Schedule of Accrued Liabilities
Payroll-related liabilities	$ 8,772		$ 6,446
Product warranty accrual	6,096	4,545	4,187	5,117	4,708	4,415
Freight accrual	2,319		1,119
Pension benefit liabilities	2,150		2,110
Professional fees payable	2,127		2,011
Purchase order commitments and receipts	1,894		1,473
Income taxes payable	1,420		1,730
Customer deposits	1,180		385
Value added taxes payable	376		260
Restructuring costs payable	67		1,048
Other	1,423		866
Accrued liabilities	$ 27,824		$ 21,635