Components of Other Assets (Detail) - USD ($) $ in Thousands	Jun. 26, 2015	Sep. 26, 2014
Other Assets Noncurrent [Line Items]
Purchase Price Notes Receivable from Beneq, non- current portion	$ 1,300	$ 1,950
Component Device Receivable from Beneq, non-current portion	1,733	2,741
Other	1,684	2,559
Total other assets	$ 4,717	$ 7,250