Accrued Liabilities (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Sep. 26, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Mar. 29, 2014
Disclosure Accrued Liabilities [Abstract]
Payroll-related liabilities	$ 7,654		$ 6,723
Product warranty accrual	4,686	$ 4,451	3,342	$ 3,493	$ 3,152	$ 4,215
Purchase order commitments and receipts	3,079		1,815
Product Warranty Accrual, Current	3,046		3,342
Customer Deposits, Current	2,291		1,057
Accrued Professional Fees, Current	1,345		1,237
Restructuring Reserve	982		1,997
Other	2,583		2,495
Accrued liabilities	20,980		18,666
Payables and Accruals [Abstract]
Product Warranty Accrual, Noncurrent	1,640		0
Other Sundry Liabilities, Noncurrent	1,526		1,571
Liabilities, Other than Long-term Debt, Noncurrent	$ 3,166		$ 1,571