Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012	Jul. 02, 2011	Apr. 02, 2011
Schedule of Accrued Liabilities
Payroll-related liabilities	$ 5,560	$ 6,446
Product warranty accrual	4,545	4,187	4,708	4,415
Income taxes payable	2,289	1,730
Pension benefit liabilities	1,986	2,110
Assumed Eolite loans payable	1,823
Professional fees payable	1,508	2,011
Purchase order commitments and receipts	1,428	1,473
Freight accrual	1,317	1,119
Customer deposits	679	385
Restructuring costs payable	331	1,048
Value added taxes payable	287	260
Other	1,085	866
Accrued liabilities	$ 22,838	$ 21,635