Segment Reporting and Geographic Information (Details 2) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 24, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 97,022	$ 99,425
UK [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	69,501	73,033
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	5,920	7,737
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 21,601	$ 18,655