XML 145 R105.htm IDEA: XBRL DOCUMENT v3.19.3
Income Taxes - Activity Related to Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Sep. 27, 2019
Sep. 28, 2018
Income Tax Disclosure [Abstract]    
Beginning balance $ (300) $ (1,670)
Additions based on tax positions 0 0
Reductions based on tax positions 0 1,370
Ending balance $ (300) $ (300)