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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 18, 2020
Mar. 11, 2020
Mar. 11, 2020
Leases [Abstract]      
Operating lease expense $ 1,120 $ 1,874 $ 4,412
Variable lease expense 138 257 553
Short-term lease expense 92 62 125
Sublease expense 18 161 161
Total lease expense $ 1,368 $ 2,354 $ 5,251