XML 74 R40.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-based compensation - Restricted Stock Unit Activity (Details) - Restricted Stock Units - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Mar. 30, 2019
Sep. 29, 2018
Number of Units    
Outstanding, beginning balance (in shares) 0  
Forfeited (in shares) 6,124,663  
Exercised (in shares) (29,575)  
Granted (in shares) (26,730)  
Outstanding, ending balance (in shares) 6,068,358  
Weighted Average Grant Date Fair Value    
Outstanding, beginning balance (in usd per share) $ 0.00  
Outstanding, ending balance (in usd per share) $ 11.46  
Additional Information    
Aggregate Intrinsic Value $ 62,443 $ 0
Options vested and expected to vest (in shares) 4,561,416  
Options vested and expected to vest - Weighted Average Exercise Price (in USD per share) $ 11.47  
Options vested and expected to vest - Weighted Average Intrinsic Value $ 46,937