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Goodwill and Intangible Assets, Net (Tables)
 12 Months Ended
Sep. 29, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill during fiscal 2019 and 2018 were as follows (in thousands):
Balance at October 1, 2017
$
51,412

Sale of company-operated restaurants to franchisees
(4,663
)
Balance at September 30, 2018
46,749

Sale of company-operated restaurants to franchisees
(2
)
Balance at September 29, 2019
$
46,747
Schedule of Intangible Assets
Intangible assets, net, consist of the following as of the end of each fiscal year (in thousands):
 
 
2019
 
2018
Gross carrying amount
 
$
6,692

 
$
6,751

Less accumulated amortization
 
(6,267
)
 
(6,151
)
Net carrying amount
 
$
425

 
$
600
Estimated Amortization Expense
The following table summarizes, as of September 29, 2019, the estimated amortization expense for each of the next five fiscal years (in thousands):
2020
$
108

2021
$
95

2022
$
36

2023
$
20

2024
$
17